Critical · CVSS 9.8
An incorrect access control vulnerability in reportico-web <= 8.1.0 allows an unauthenticated attacker to inject arbitrary php code into the PreExecuteCode attribute of any report regardless of the safe_mode setting leading to remote code execution.
Published Aug 18, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.4
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to obtain sensitive information due to an integer underflow in the IPv4 IP-options parser.
Published Aug 19, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.8
The JSON Options WordPress plugin through 0.0.4 does not have any capability check or nonce verification on one of its actions, which runs on every request and is available to unauthenticated users, allowing them to update arbitrary WordPress options. This can be leveraged to enable user registration and set the default role to administrator, leading to privilege escalation and full site takeover.
Published Aug 20, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.9
Vulnerability in the Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager). Supported versions that are affected are 22.3-26.6. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel CRM Cloud Applications. While the vulnerability is in Siebel CRM Cloud Applications, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Siebel CRM Cloud Applications. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).
Published Aug 18, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.8
Vulnerability in the Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager). Supported versions that are affected are 22.3-26.6. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Cloud Applications. Successful attacks of this vulnerability can result in takeover of Siebel CRM Cloud Applications. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Published Aug 18, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.9
Vulnerability in the Siebel CRM Integration product of Oracle Siebel CRM (component: Open Integration). Supported versions that are affected are 25.12-26.6. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel CRM Integration. While the vulnerability is in Siebel CRM Integration, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Siebel CRM Integration. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).
Published Aug 18, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.5
A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server versions 5.3.X to 5.3.9, 5.4.X to 5.4.9, 5.5.X to 5.5.5, and earlier could use a specially crafted script to break out of the isolated environment and execute arbitrary code on the host system.
Published Aug 19, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.8
A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server versions 5.3.X to 5.3.9, 5.4.X to 5.4.9, 5.5.X to 5.5.5, and earlier could execute an arbitrary script by calling an undocumented function.
Published Aug 19, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.8
Vulnerability in the Siebel CRM Integration product of Oracle Siebel CRM (component: Open Integration). Supported versions that are affected are 25.12-26.6. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Integration. Successful attacks of this vulnerability can result in takeover of Siebel CRM Integration. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Published Aug 18, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.6
Vulnerability in the Oracle WebCenter Content product of Oracle Fusion Middleware (component: Content Server). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebCenter Content. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle WebCenter Content, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle WebCenter Content accessible data as well as unauthorized access to critical data or complete access to all Oracle WebCenter Content accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle WebCenter Content. CVSS 3.1 Base Score 9.6 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L).
Published Aug 18, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.6
Buffer overflow in Dawn in Google Chrome on on Android prior to 151.0.7922.169 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)
Published Aug 18, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.6
Inappropriate implementation in Media in Google Chrome on on Mac prior to 151.0.7922.169 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
Published Aug 18, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.8
NVIDIA Triton Inference Server for Linux contains a vulnerability where an attacker could cause path traversal. A successful exploit might lead to denial of service.
Published Aug 18, 2026 · Updated Aug 20, 2026
Critical · CVSS 9.3
Unauthenticated SQL Injection in Nikstore Core <= 1.5 versions.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.9
Etherpad is a real-time collaborative editor. From 2.1.0 until 3.1.0, Etherpad's src/node/handler/APIHandler.ts authorizes requests to /api/2/* in the authorization_code OAuth path by using requiredClaims with the admin claim. This check requires only that the claim exists, while src/node/security/OAuth2Provider.ts issues admin: false for configured non-admin users. A non-admin user with a valid signed token can therefore invoke administrative functions including setHTML, setText, appendText, deletePad, copyPad, movePad, restoreRevision, anonymizeAuthor, listAllPads, and listAuthorsOfPad, allowing disclosure, modification, or deletion of pads across the instance. This issue is fixed in version 3.1.0.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.8
Customer PHP Object Injection in Flexible Subscriptions <= 1.8.1 versions.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 10
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Crosswork engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20030 are related to improper neutralization of special elements used in a SQL command issues that are grouped under the Common Weakness Enumeration (CWE) CWE-89.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.4
Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.6, the Grav API plugin WebhookController.php accepts webhook URLs after only FILTER_VALIDATE_URL syntax validation, and WebhookDispatcher.php initializes cURL without CURLOPT_PROTOCOLS or CURLOPT_REDIR_PROTOCOLS restrictions. An account with api.webhooks.write can submit file, dict, gopher, private-network, or link-local targets, retrieve local files and delivery response bodies, and pivot requests to internal services or cloud metadata endpoints. This issue is fixed in version 1.0.6.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.3
An insecure deserialization vulnerability in vsDesk allows a remote attacker to gain unauthorized administrative access. By manipulating application configuration data, an attacker can force the system to authenticate against an arbitrary LDAP server and provision a new administrative account.
Apply patch from vendor https://vsdesk.ru/ . Versions 14.0402 and on have the patch.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.8
An issue was discovered in openHiTLS 0.2.0 through 0.3.2. In the X.509 certificate chain verification, the basic constraints extension and CA flag processing of intermediate CAs are only verified for v3 certificates, and v1/v2 certificates are ignored.
Published Aug 18, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.8
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Published Aug 18, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.3
Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, a single quote in a schema property name is emitted into single-quoted object keys in generated MSW mock factories without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated mock factory is called by tests or an MSW handler, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/core/src/getters/keys.ts function getKey and MSW mock generation. This issue is fixed in version 8.21.0.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.3
Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, an unescaped backtick in servers[0].url is emitted into request URL template literals generated when output.baseUrl.getBaseUrlFromSpecification is enabled without safe encoding. This permits attacker-controlled JavaScript to be evaluated when a generated request or URL-builder function is called, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/core/src/getters/route.ts function getFullRoute. This issue is fixed in version 8.21.0.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.4
MyBooks is an enhanced and easy-to-use personal ebook management web server also known as Talebook. In 3.41.2 and earlier, the AdminSettings.post handler in webserver/handlers/admin.py accepts SOCIAL_AUTH key names without validating quotes or newline characters, and SettingsLoader.dumpfile in webserver/loader.py concatenates those names into the generated Python source file auto.py without escaping them. An administrator can submit a crafted SOCIAL_AUTH key name that closes the settings dictionary and injects arbitrary Python statements. The application later executes those statements because SettingsLoader.loadfile imports auto.py as a module, and setting autoreload to true invokes restart_async so a process supervisor restarts the service and triggers the import. Successful exploitation executes commands with the privileges of the application service account and can disclose data, modify files, establish persistence, or disrupt the service. Related authorization and registration vulnerabilities can reduce the effective privilege requirement in a chained attack, but the standalone vulnerability requires administrator access. This issue is fixed in version 3.42.0.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.1
Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.3.0 until 4.14.6 and 5.0.0-beta3, the non-merged branch of process_files_from_worker() in framework/wazuh/core/cluster/master.py trusts a peer-controlled file_path key from files_metadata.json. The destination is joined to WAZUH_PATH without proving that it remains inside the directory selected by cluster_item_key. A cluster peer holding the shared Fernet key can upload a crafted extra-valid archive and overwrite security-sensitive files such as /var/ossec/etc/ossec.conf. Replacing ossec.conf can configure root-executed commands and lead to code execution after a service reload. This issue is fixed in versions 4.14.6 and 5.0.0-beta3.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.8
Formie is a Craft CMS plugin for creating forms. Prior to 3.1.27, Formie can pass request-derived Hidden field defaults such as HTTP User Agent, Referer URL, Current URL, Current URL without Query String, Query Parameter, and Cookie Value to Craft's Twig rendering layer during front-end form rendering. An unauthenticated attacker can place Twig syntax in one of these request-controlled inputs when a public form contains an affected Hidden field. Hidden::getFrontEndInputOptions() then assigns the value to defaultValue and calls renderString, causing server-side template evaluation rather than treating the request data as a plain string. Depending on the Craft site configuration and available Twig capabilities, exploitation can disclose sensitive information, modify application state, or achieve remote code execution. This issue is fixed in version 3.1.27.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.3
Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. From version 8.19.0 until 8.21.0, a double quote in a schema property name is emitted into the generated zod.object({...}) schema without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated zod schema module is imported, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/zod/src/index.ts and zod object-key generation. This issue is fixed in version 8.21.0.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.3
Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, a ${...} expression or backtick in a query parameter default is emitted into a module-level template literal emitted by zod schema generation without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated zod schema module is imported, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/zod/src/index.ts function formatDefaultValue. This issue is fixed in version 8.21.0.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.8
Vulnerability in the Oracle Identity Manager product of Oracle Fusion Middleware (component: OIM Legacy UI). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.1.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Identity Manager. Successful attacks of this vulnerability can result in takeover of Oracle Identity Manager. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Published Aug 18, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.1
Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Portlet Services). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebCenter Portal. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle WebCenter Portal accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle WebCenter Portal. CVSS 3.1 Base Score 9.1 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H).
Published Aug 18, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.9
Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Composer). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle WebCenter Portal. While the vulnerability is in Oracle WebCenter Portal, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle WebCenter Portal. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).
Published Aug 18, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.8
The TabaPay Gateway WordPress plugin through 1.4.0 does not validate the payment callback before establishing a session for the account associated with the referenced order, allowing unauthenticated attackers to log in as any registered user, including an administrator.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 10
The W3 Total Cache WordPress plugin before 2.10.5 does not properly validate the request path it uses to build cache file names, allowing unauthenticated attackers to write a file into any existing directory on the server, inside or outside the web root, overwriting whatever occupies the target name.
On Apache, the same flaw overwrites the site's .htaccess files, which breaks the site and can strip hardening rules that other security measures rely on.
Published Aug 19, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.8
In the Linux kernel, the following vulnerability has been resolved:
um: vector: fix use-after-free in vector_mmsg_rx()
When vector_mmsg_rx() discards a packet whose overlay header fails
verify_header(), it frees the skb and continues the loop:
if (header_check < 0) {
dev_kfree_skb_irq(skb);
vp->estats.rx_encaps_errors++;
continue;
}
The normal and short-packet paths fall through to the bottom of the
loop body, which clears the consumed slot and advances the cursors:
(*skbuff_vector) = NULL;
mmsg_vector++;
skbuff_vector++;
The verify_header() < 0 path skips that via continue, so the freed skb
is left in skbuff_vector[] and the cursors do not advance. The next
iteration reads the same slot, gets the freed skb, and frees it again,
producing a refcount underflow / use-after-free in the RX path.
Discard the slot the same way the other paths do before continuing.
Only transports whose verify_header() can return negative are affected:
GRE and L2TPv3 do so on a cookie/session-id mismatch (raw/tap do not),
so any peer on such a transport can trigger it without authentication.
Published Aug 15, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.8
In the Linux kernel, the following vulnerability has been resolved:
amt: re-read skb header pointers after every pull
Several AMT receive and transmit paths cache a pointer into the skb head
(ip_hdr(), ipv6_hdr(), eth_hdr() or the AMT message header) and then call
a helper that can reallocate that head before the cached pointer is used
again. pskb_may_pull(), ip_mc_may_pull(), ipv6_mc_may_pull(),
iptunnel_pull_header(), ip_mc_check_igmp() and ipv6_mc_check_mld() can all
free the old head and move the data, so a pointer taken before the call
dangles afterwards and the later access is a use-after-free of the freed
head.
The affected sites are:
amt_rcv() caches ip_hdr() before amt_parse_type() pulls, then reads
iph->saddr.
amt_dev_xmit() caches ip_hdr()/ipv6_hdr() before ip_mc_check_igmp()/
ipv6_mc_check_mld() and pskb_may_pull(), then reads the group address.
amt_multicast_data_handler() caches eth_hdr() before pskb_may_pull(),
then writes the L2 header.
amt_membership_query_handler() caches the AMT header, the outer and
inner eth_hdr() and ip_hdr() before iptunnel_pull_header() and several
pulls, then reads and writes them.
amt_igmpv3_report_handler() and amt_mldv2_report_handler() cache
ip_hdr()/ipv6_hdr() and the current group record and read the record
count from the report header inside the record loop, across the
*_mc_may_pull() calls.
amt_update_handler() caches ip_hdr() and the AMT membership-update
header before pskb_may_pull(), iptunnel_pull_header(),
ip_mc_check_igmp() and the report handler, then reads iph->daddr and
amtmu->nonce / amtmu->response_mac.
Fix each site by either snapshotting the scalar that is used after the
pull before the first pull runs, or re-deriving the header pointer from
the skb after the last pull that can move the head. Values that are
stable across the pull (source and group address, the response MAC and
nonce, the record count, the outer source MAC) are snapshotted; pointers
that are written through or read repeatedly are re-derived.
Published Aug 10, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.1
Microsoft Exchange Server Remote Code Execution Vulnerability
Published Mar 2, 2021 · Updated Aug 19, 2026
Critical · CVSS 9.8
Windows DNS Server Remote Code Execution Vulnerability
Published Mar 11, 2021 · Updated Aug 19, 2026
Critical · CVSS 9.8
Windows DNS Server Remote Code Execution Vulnerability
Published Mar 11, 2021 · Updated Aug 19, 2026
Critical · CVSS 9.8
Windows DNS Server Remote Code Execution Vulnerability
Published Mar 11, 2021 · Updated Aug 19, 2026
Critical · CVSS 9.8
Windows DNS Server Remote Code Execution Vulnerability
Published Mar 11, 2021 · Updated Aug 19, 2026
Critical · CVSS 9.8
Windows DNS Server Remote Code Execution Vulnerability
Published Mar 11, 2021 · Updated Aug 19, 2026
Critical · CVSS 9.9
Windows Hyper-V Remote Code Execution Vulnerability
Published Mar 11, 2021 · Updated Aug 19, 2026
Critical · CVSS 9.1 · CISA KEV
Microsoft Exchange Server Remote Code Execution Vulnerability
Published Mar 2, 2021 · Updated Aug 19, 2026
Critical · CVSS 9.1
Microsoft Exchange Server Remote Code Execution Vulnerability
Published Mar 2, 2021 · Updated Aug 19, 2026
Critical · CVSS 9.3
Azure Sphere Unsigned Code Execution Vulnerability
Published Mar 11, 2021 · Updated Aug 19, 2026
Critical · CVSS 9.8
In the Linux kernel, the following vulnerability has been resolved:
net/x25: fix use-after-free in x25_kill_by_neigh()
x25_kill_by_neigh() walks the global X.25 socket list looking for sockets
attached to a terminating neighbour. x25_list_lock protects list membership
while the lookup is in progress, but it does not pin a socket's lifetime
after the lock is dropped.
The function currently drops x25_list_lock before calling lock_sock(s). A
concurrent close can run x25_release(), remove the same socket from
x25_list, and drop the last socket reference in that window. The neighbour
teardown path can then lock or inspect a freed struct sock/struct x25_sock.
Take sock_hold(s) while x25_list_lock still proves that the list entry is
live, then drop the temporary reference after the socket has been locked,
rechecked, and released. Recheck x25_sk(s)->neighbour after lock_sock(),
because another path may have disconnected the socket before this path
acquired the socket lock. Restart the list walk after each disconnect
because the list lock was dropped and the previous iterator state may no
longer be valid.
A QEMU/KASAN run against origin/master reproduced a slab-use-after-free in
x25_kill_by_neigh().
Published Aug 10, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.6
In the Linux kernel, the following vulnerability has been resolved:
mctp: serial: handle zero-length frames to prevent rx buffer overflow
The MCTP serial receive state machine reads a frame length byte in
mctp_serial_push_header() case 2 and validates it upper-bound-only:
if (c > MCTP_SERIAL_FRAME_MTU) {
dev->rxstate = STATE_ERR;
} else {
dev->rxlen = c;
dev->rxpos = 0;
dev->rxstate = STATE_DATA;
...
}
A length of zero passes this check, so rxlen is set to 0 and the state
machine advances to STATE_DATA. In mctp_serial_push() STATE_DATA, the
incoming byte is stored and rxpos incremented before the terminator is
dev->rxbuf[dev->rxpos] = c;
dev->rxpos++;
dev->rxstate = STATE_DATA;
if (dev->rxpos == dev->rxlen) {
dev->rxpos = 0;
dev->rxstate = STATE_TRAILER;
}
With rxlen == 0 the "rxpos == rxlen" terminator can never fire (rxpos is
already 1 on the first data byte), so subsequent bytes are written past
the end of the fixed 74-byte rxbuf, which is the last member of the
netdev private area. Every following data byte is an attacker-controlled
1-byte out-of-bounds heap write, and the overflow continues until a
frame (0x7e) or escape byte resets the parser -- effectively unbounded.
Reaching this requires CAP_NET_ADMIN to attach the N_MCTP line
discipline and bring the resulting mctpserialN netdev up, after which
the bytes arrive via the tty receive path.
Route a zero-length frame straight to STATE_TRAILER instead of
STATE_DATA. The trailer/framing bytes are still consumed, and the frame
resolves to a zero-length skb that the MCTP core rejects; the parser
never enters STATE_DATA with rxlen == 0, so the out-of-bounds write can
no longer occur.
KASAN, on a frame of 0x7e 0x01 0x00 followed by data bytes (before this
change):
UBSAN: array-index-out-of-bounds in drivers/net/mctp/mctp-serial.c:370
index 74 is out of range for type 'u8 [74]'
BUG: KASAN: slab-out-of-bounds in mctp_serial_tty_receive_buf
Write of size 1 at addr ... by task kworker/u16:0
mctp_serial_tty_receive_buf
tty_ldisc_receive_buf
flush_to_ldisc
Allocated by task 152:
alloc_netdev_mqs
mctp_serial_open
v2: route zero-length frames to STATE_TRAILER instead of STATE_ERR so
the trailer/framing bytes are still consumed (Jeremy Kerr).
Found by 0sec automated security-research tooling (https://0sec.ai).
Published Aug 10, 2026 · Updated Aug 19, 2026
Critical · CVSS 9.8
Microsoft Word Remote Code Execution Vulnerability
Published Feb 14, 2023 · Updated Aug 19, 2026
Critical · CVSS 9.8
Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability
Published Feb 14, 2023 · Updated Aug 19, 2026
Critical · CVSS 9.8
Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability
Published Feb 14, 2023 · Updated Aug 19, 2026