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CVE Record

CVE-2024-35916: dma-buf: Fix NULL pointer dereference in sanitycheck()

In the Linux kernel, the following vulnerability has been resolved: dma-buf: Fix NULL pointer dereference in sanitycheck() If due to a memory allocation failure mock_chain() returns NULL, it is passed to dma_fence_enable_sw_signaling() resulting in NULL pointer dereference there. Call dma_fence_enable_sw_signaling() only if mock_chain() succeeds. Found by Linux Verification Center (linuxtesting.org) with SVACE.

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue can crash affected systems if a memory allocation failure leads kernel code to use a missing object. The business impact is availability, not data theft or data modification. The source bundle rates it medium, with CVSS 5.3, and provides upstream stable kernel fixes.

Executive priority

Schedule remediation through standard kernel patch cycles, with higher urgency for systems where downtime has business impact. This is not presented as a data breach issue, but unpatched systems may face avoidable service interruption risk.

Technical view

In dma-buf, sanitycheck() could pass a NULL return from mock_chain() into dma_fence_enable_sw_signaling(), causing a NULL pointer dereference. The fix gates that call on mock_chain() success. The CVSS vector indicates low availability impact and no confidentiality or integrity impact.

Likely exposure

Exposure is limited to Linux systems running affected kernel versions or downstream builds without the referenced stable fixes. Exact exposure depends on kernel branch and vendor backports; validate against vendor package advisories and kernel changelogs.

Exploitation context

The bundle does not show CISA KEV listing or any cited evidence of active exploitation. It describes a NULL dereference triggered by allocation failure, so treat this mainly as a denial-of-service risk unless vendor guidance states otherwise.

Researcher notes

The source evidence is narrow: a Linux kernel dma-buf NULL dereference fixed by checking mock_chain() before enabling software signaling. No CWE is listed. Avoid claiming exploitability beyond the CVSS vector and the availability impact described by the CVE record.

Mitigation direction

  • Upgrade to a kernel containing the referenced stable fixes.
  • Check distribution advisories for backported fixes before assuming version numbers are sufficient.
  • Prioritize internet-facing or high-availability Linux systems first.
  • Track remediation through normal kernel patch management and reboot workflows.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, containers hosts, and images.
  • Compare running kernels with vendor advisories and the referenced stable commits.
  • Confirm patched kernels are actually booted after update and reboot.
  • Review monitoring for kernel crash or availability events on exposed systems.
Prepared
Confidence
high
Sources
6

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-2024-35916 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

1CVSS vectors
3Timeline events
2ADP providers
5Source links

SSVC decision data

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

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
5.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

5.3Medium
CVSS 3.1 vector shape for CVE-2024-35916Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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
cvssV3_1other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxd62c43a953ce02d54521ec06217d0c2ed6d489af, d62c43a953ce02d54521ec06217d0c2ed6d489af, d62c43a953ce02d54521ec06217d0c2ed6d489af, d62c43a953ce02d54521ec06217d0c2ed6d489afunaffected
LinuxLinux6.1, 0, 6.1.85, 6.6.26, 6.8.5, 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.