Security readout for executives and security teams
Plain-English summary
A Linux networking driver flaw can let a low-privileged local user trigger unsafe kernel memory access. Successful abuse could potentially compromise confidentiality, integrity, or availability. Exposure is limited to affected kernels using the Marvell PPv2 Ethernet driver; the supplied evidence does not establish remote or active exploitation.
Executive priority
Treat as a high-priority, scoped kernel update. Accelerate remediation where untrusted users have local access and mvpp2 hardware is present. Systems without that driver are unlikely to be exposed through this code path, but version and backport status require vendor confirmation.
Technical view
In mvpp2_ethtool_get_rxnfc(), a user-controlled rule count determines allocation size for the rules buffer. Insufficient validation can cause an out-of-bounds write or NULL-pointer dereference. CVSS 3.1 rates it 7.8: local access, low privileges, low complexity, no user interaction, and potentially high confidentiality, integrity, and availability impact.
Likely exposure
Prioritize Linux hosts or appliances using the mvpp2 Marvell PPv2 Ethernet driver and an affected kernel release. The supplied version data is ambiguous and includes duplicate hashes, so confirm exposure against the running distribution's advisory and package changelog rather than relying solely on the listed versions.
Exploitation context
The supplied CVSS vector requires local access and low privileges; it does not describe a network-reachable attack. The CVE is not listed as KEV, and the provided sources contain no evidence of active exploitation or a public exploit. Practical exploitability beyond crashes is not established here.
Researcher notes
The core defect is inadequate validation of user-supplied rule_cnt before using the allocated rules buffer. The documented outcomes are an out-of-bounds write or NULL dereference. The bundle provides several stable-kernel fix commits but insufficiently clear affected-version boundaries; assess branch-specific ancestry and distribution backports.
Mitigation direction
- Install a vendor-supported kernel containing the applicable stable fix.
- Check distribution advisories for backported fixes before comparing version numbers.
- Restrict unnecessary local accounts and privileged network-configuration access until patched.
- Prioritize exposed multi-user systems and appliances using the mvpp2 driver.
Validation and detection
- Record the running kernel and determine whether the mvpp2 driver is present or loaded.
- Compare installed kernel packages with the distribution's CVE advisory and changelog.
- Confirm the vendor kernel includes the applicable referenced stable commit.
- After updating, verify the new kernel is running and networking operates normally.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2023-53495 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9LinuxVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/ba6673824efa3dc198b04a54e69dce480066d7d9CVE reference, Linux
- https://git.kernel.org/stable/c/61054a8ddb176b155a8f2bacdfefb3727187f5d9CVE reference, Linux
- https://git.kernel.org/stable/c/5bb09dddc724c5f7c4dc6dd3bfebd685eecd93e8CVE reference, Linux
- https://git.kernel.org/stable/c/349638f7e5d3c7d328565587bb7b0454bbee02e2CVE reference, Linux
- https://git.kernel.org/stable/c/625b70d31dd4df4b96b3ddcbe251debb33bd67f5CVE reference, Linux
- https://git.kernel.org/stable/c/51fe0a470543f345e3c62b6798929de3ddcedc1dCVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.