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CVE archive

January 2023

Browse CVE records published in January 2023, with severity, affected products, CWE, KEV, and source-backed vulnerability context.

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Showing 50 of 2291 matching CVEs · Page 8 of 46.

Medium · CVSS 5.5

CVE-2023-46835: x86/AMD: mismatch in IOMMU quarantine page table levels

The current setup of the quarantine page tables assumes that the quarantine domain (dom_io) has been initialized with an address width of DEFAULT_DOMAIN_ADDRESS_WIDTH (48) and hence 4 page table levels. However dom_io being a PV domain gets the AMD-Vi IOMMU page tables levels based on the maximum (hot pluggable) RAM address, and hence on systems with no RAM above the 512GB mark only 3 page-table levels are configured in the IOMMU. On systems without RAM above the 512GB boundary amd_iommu_quarantine_init() will setup page tables for the scratch page with 4 levels, while the IOMMU will be configured to use 3 levels only, resulting in the last page table directory (PDE) effectively becoming a page table entry (PTE), and hence a device in quarantine mode gaining write access to the page destined to be a PDE. Due to this page table level mismatch, the sink page the device gets read/write access to is no longer cleared between device assignment, possibly leading to data leaks.

Published Jan 5, 2024 · Updated Nov 4, 2025

Low · CVSS 3.3

CVE-2023-38612: The issue was addressed with improved checks.

The issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.7, iOS 16.7 and iPadOS 16.7, iOS 17 and iPadOS 17, macOS Sonoma 14, macOS Ventura 13.6. An app may be able to access protected user data.

Published Jan 10, 2024 · Updated Nov 4, 2025

Medium · CVSS 5.5

CVE-2023-34328: x86/AMD: Debug Mask handling

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] AMD CPUs since ~2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service. 1) CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previous vCPUs debug mask state. 2) CVE-2023-34328 - A PV vCPU can place a breakpoint over the live GDT. This allows the PV vCPU to exploit XSA-156 / CVE-2015-8104 and lock up the CPU entirely.

Published Jan 5, 2024 · Updated Nov 4, 2025

Medium · CVSS 5.5

CVE-2023-34327: x86/AMD: Debug Mask handling

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] AMD CPUs since ~2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service. 1) CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previous vCPUs debug mask state. 2) CVE-2023-34328 - A PV vCPU can place a breakpoint over the live GDT. This allows the PV vCPU to exploit XSA-156 / CVE-2015-8104 and lock up the CPU entirely.

Published Jan 5, 2024 · Updated Nov 4, 2025

High · CVSS 7.8

CVE-2023-34326: x86/AMD: missing IOMMU TLB flushing

The caching invalidation guidelines from the AMD-Vi specification (48882—Rev 3.07-PUB—Oct 2022) is incorrect on some hardware, as devices will malfunction (see stale DMA mappings) if some fields of the DTE are updated but the IOMMU TLB is not flushed. Such stale DMA mappings can point to memory ranges not owned by the guest, thus allowing access to unindented memory regions.

Published Jan 5, 2024 · Updated Nov 4, 2025

High · CVSS 7.8

CVE-2023-34325: Multiple vulnerabilities in libfsimage disk handling

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] libfsimage contains parsing code for several filesystems, most of them based on grub-legacy code. libfsimage is used by pygrub to inspect guest disks. Pygrub runs as the same user as the toolstack (root in a priviledged domain). At least one issue has been reported to the Xen Security Team that allows an attacker to trigger a stack buffer overflow in libfsimage. After further analisys the Xen Security Team is no longer confident in the suitability of libfsimage when run against guest controlled input with super user priviledges. In order to not affect current deployments that rely on pygrub patches are provided in the resolution section of the advisory that allow running pygrub in deprivileged mode. CVE-2023-4949 refers to the original issue in the upstream grub project ("An attacker with local access to a system (either through a disk or external drive) can present a modified XFS partition to grub-legacy in such a way to exploit a memory corruption in grub’s XFS file system implementation.") CVE-2023-34325 refers specifically to the vulnerabilities in Xen's copy of libfsimage, which is decended from a very old version of grub.

Published Jan 5, 2024 · Updated Nov 4, 2025

Medium · CVSS 4.9

CVE-2023-34324: Possible deadlock in Linux kernel event handling

Closing of an event channel in the Linux kernel can result in a deadlock. This happens when the close is being performed in parallel to an unrelated Xen console action and the handling of a Xen console interrupt in an unprivileged guest. The closing of an event channel is e.g. triggered by removal of a paravirtual device on the other side. As this action will cause console messages to be issued on the other side quite often, the chance of triggering the deadlock is not neglectable. Note that 32-bit Arm-guests are not affected, as the 32-bit Linux kernel on Arm doesn't use queued-RW-locks, which are required to trigger the issue (on Arm32 a waiting writer doesn't block further readers to get the lock).

Published Jan 5, 2024 · Updated Nov 4, 2025

Medium · CVSS 5.5

CVE-2023-34323: xenstored: A transaction conflict can crash C Xenstored

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction. Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

Published Jan 5, 2024 · Updated Nov 4, 2025

High · CVSS 7.8

CVE-2023-34322: top-level shadow reference dropped too early for 64-bit PV guests

For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run directly the respective shadow page tables. For 64-bit PV guests this means running on the shadow of the guest root page table. In the course of dealing with shortage of memory in the shadow pool associated with a domain, shadows of page tables may be torn down. This tearing down may include the shadow root page table that the CPU in question is presently running on. While a precaution exists to supposedly prevent the tearing down of the underlying live page table, the time window covered by that precaution isn't large enough.

Published Jan 5, 2024 · Updated Nov 4, 2025

Low · CVSS 3.3

CVE-2023-34321: arm32: The cache may not be properly cleaned/invalidated

Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance, used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all the writes will reach the memory.

Published Jan 5, 2024 · Updated Nov 4, 2025

High · CVSS 7.3

CVE-2023-49810: A login attempt restriction bypass vulnerability exists in the checkLoginAttempts functionality of WWBN AVi...

A login attempt restriction bypass vulnerability exists in the checkLoginAttempts functionality of WWBN AVideo dev master commit 15fed957fb. A specially crafted HTTP request can lead to captcha bypass, which can be abused by an attacker to brute force user credentials. An attacker can send a series of HTTP requests to trigger this vulnerability.

Published Jan 10, 2024 · Updated Nov 4, 2025

Medium · CVSS 4.3

CVE-2023-49715: A unrestricted php file upload vulnerability exists in the import.json.php temporary copy functionality of...

A unrestricted php file upload vulnerability exists in the import.json.php temporary copy functionality of WWBN AVideo dev master commit 15fed957fb. A specially crafted HTTP request can lead to arbitrary code execution when chained with an LFI vulnerability. An attacker can send a series of HTTP requests to trigger this vulnerability.

Published Jan 10, 2024 · Updated Nov 4, 2025

Critical · CVSS 9.8

CVE-2023-49599: An insufficient entropy vulnerability exists in the salt generation functionality of WWBN AVideo dev master...

An insufficient entropy vulnerability exists in the salt generation functionality of WWBN AVideo dev master commit 15fed957fb. A specially crafted series of HTTP requests can lead to privilege escalation. An attacker can gather system information via HTTP requests and brute force the salt offline, leading to forging a legitimate password recovery code for the admin user.

Published Jan 10, 2024 · Updated Nov 4, 2025

High · CVSS 7.5

CVE-2023-46838: Linux: netback processing of zero-length transmit fragment

Transmit requests in Xen's virtual network protocol can consist of multiple parts. While not really useful, except for the initial part any of them may be of zero length, i.e. carry no data at all. Besides a certain initial portion of the to be transferred data, these parts are directly translated into what Linux calls SKB fragments. Such converted request parts can, when for a particular SKB they are all of length zero, lead to a de-reference of NULL in core networking code.

Published Jan 29, 2024 · Updated Nov 4, 2025

Low · CVSS 3.3

CVE-2023-46837: arm32: The cache may not be properly cleaned/invalidated (take two)

Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance, used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all the writes will reach the memory. This undefined behavior was meant to be addressed by XSA-437, but the approach was not sufficient.

Published Jan 5, 2024 · Updated Nov 4, 2025