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CVE Record

CVE-2024-36957: octeontx2-af: avoid off-by-one read from userspace

In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: avoid off-by-one read from userspace We try to access count + 1 byte from userspace with memdup_user(buffer, count + 1). However, the userspace only provides buffer of count bytes and only these count bytes are verified to be okay to access. To ensure the copied buffer is NUL terminated, we use memdup_user_nul instead.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel bug in the OcteonTX2 administrative-function driver. A user-provided buffer could be read one byte past its validated length. The public record confirms a kernel fix, but does not provide CVSS, impact severity, or evidence of exploitation.

Executive priority

Treat as a routine kernel patching item unless your fleet uses OcteonTX2-related hardware or custom kernels. Prioritize systems with the driver exposed, but current public evidence does not justify emergency response.

Technical view

The vulnerable code called memdup_user(buffer, count + 1), although userspace only supplied and validated count bytes. The fix switches to memdup_user_nul to copy the provided bytes while ensuring NUL termination. Affected Linux kernel versions are listed in the CVE bundle, with multiple stable backport commits referenced.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions where the octeontx2-af driver code is present and reachable. This is most relevant to environments using Marvell OcteonTX2-related networking hardware or kernels carrying that driver.

Exploitation context

The sources do not show active exploitation, public exploit availability, or KEV listing. The issue appears locally reachable from userspace interaction with the affected driver path, but the bundle does not establish exploitability beyond the off-by-one read condition.

Researcher notes

Key evidence is the kernel commit message: an off-by-one userspace read caused by count + 1 copying. Missing data includes CVSS, CWE, concrete impact, privilege requirements, and exploit confirmation, so severity should remain conservative.

Mitigation direction

  • Upgrade to a kernel containing the referenced stable fix commits.
  • Apply distribution kernel updates, including Debian LTS updates where applicable.
  • Check your Linux vendor advisory for affected package versions.
  • Disable unused OcteonTX2 AF driver support only if operationally safe.

Validation and detection

  • Inventory kernels against the affected versions listed in the CVE record.
  • Confirm whether octeontx2-af is built, loaded, or used on relevant hosts.
  • Verify installed kernel includes one referenced stable fix commit or vendor backport.
  • Review distro advisories for package-level fixed versions.
Prepared
Confidence
medium
Sources
9

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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CVE-2024-36957 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
3Timeline events
2ADP providers
8Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxdae49384d0d7695540e2d75168f323cef1384810, 3a2eb515d1367c0f667b76089a6e727279c688b8, 3a2eb515d1367c0f667b76089a6e727279c688b8, 3a2eb515d1367c0f667b76089a6e727279c688b8, 3a2eb515d1367c0f667b76089a6e727279c688b8, 3a2eb515d1367c0f667b76089a6e727279c688b8, c9a2ed3fdd037314a71e6a6ba5d99a3605f6f9c7unaffected
LinuxLinux5.12, 0, 5.10.217, 5.15.159, 6.1.91, 6.6.31, 6.8.10, 6.9affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.