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CVE Record

CVE-2024-42313: media: venus: fix use after free in vdec_close

In the Linux kernel, the following vulnerability has been resolved: media: venus: fix use after free in vdec_close There appears to be a possible use after free with vdec_close(). The firmware will add buffer release work to the work queue through HFI callbacks as a normal part of decoding. Randomly closing the decoder device from userspace during normal decoding can incur a read after free for inst. Fix it by cancelling the work in vdec_close.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A flaw in the Linux Venus video-decoder driver can leave background work using decoder state after that state is freed. A local, low-privileged user able to operate the decoder may trigger memory corruption by closing it during decoding, potentially affecting confidentiality, integrity, or availability.

Executive priority

Prioritize remediation on shared or exposed-user systems that use this decoder. Treat other systems according to confirmed driver presence and local access. This is high severity, but the supplied evidence does not establish remote or active exploitation.

Technical view

Firmware callbacks can queue buffer-release work during decoding. If userspace closes the decoder while that work remains queued, vdec_close() may free the decoder instance before the work reads it. The kernel fix cancels the queued work during close, preventing the lifetime race.

Likely exposure

Exposure is limited to Linux systems using the affected Venus video-decoder code where a local, low-privileged user can access the decoder device. The supplied record identifies affected Linux releases but does not provide enough structured range detail to map every vendor kernel reliably.

Exploitation context

CVSS 3.1 rates this 7.8: local access, low complexity, low privileges, no user interaction, and potentially high confidentiality, integrity, and availability impact. The supplied bundle reports no KEV listing and provides no evidence of active exploitation.

Researcher notes

This is a workqueue lifetime race in vdec_close(), described as a possible use-after-free and observed as a read-after-free of the decoder instance. Closing during ordinary decoding is the stated trigger condition. No CWE is supplied, and the bundle does not establish exploit reliability or practical privilege escalation.

Mitigation direction

  • Install a vendor-supported kernel update containing the vdec_close queued-work cancellation fix.
  • Prioritize multi-user systems where untrusted users can access the Venus decoder.
  • Consult the Linux distribution or device vendor for exact fixed package versions.
  • Limit untrusted access to affected systems until patched where operationally feasible.

Validation and detection

  • Inventory kernel versions and systems using the Venus video-decoder driver.
  • Check vendor advisories for whether the installed kernel package contains the fix.
  • Verify the relevant stable commit or equivalent backport exists in deployed kernel sources.
  • After updating, confirm systems boot the intended fixed kernel rather than an older installed version.
Prepared
Confidence
high
Sources
5

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.

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CVE-2024-42313 mapping review

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Vulnerability profileCVE Program record
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

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
11Source 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
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2024-42313Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxaf2c3834c8ca7cc65d15592ac671933df8848115, af2c3834c8ca7cc65d15592ac671933df8848115, af2c3834c8ca7cc65d15592ac671933df8848115, af2c3834c8ca7cc65d15592ac671933df8848115, af2c3834c8ca7cc65d15592ac671933df8848115, af2c3834c8ca7cc65d15592ac671933df8848115, af2c3834c8ca7cc65d15592ac671933df8848115, af2c3834c8ca7cc65d15592ac671933df8848115unaffected
LinuxLinux4.13, 0, 4.19.320, 5.4.282, 5.10.224, 5.15.165, 6.1.103, 6.6.44, 6.10.3, 6.11affected
Weakness

CWE details

No CWE listed

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