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CVE Record

CVE-2024-46813: drm/amd/display: Check link_index before accessing dc->links[]

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Check link_index before accessing dc->links[] [WHY & HOW] dc->links[] has max size of MAX_LINKS and NULL is return when trying to access with out-of-bound index. This fixes 3 OVERRUN and 1 RESOURCE_LEAK issues reported by Coverity.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A missing bounds check in Linux’s AMD display driver can access a display-link array using an invalid index. The supplied CVSS assessment indicates a local, low-privileged user could potentially affect confidentiality, integrity, and availability. The issue was found through static analysis; the sources provide no confirmed exploitation evidence.

Executive priority

Treat this as a high-priority kernel maintenance issue, especially for shared workstations or other systems permitting untrusted local users. Patch through supported distribution channels. Emergency action is not substantiated by the supplied evidence because active exploitation is unconfirmed and network access alone does not satisfy the CVSS attack conditions.

Technical view

The AMD DRM display code did not validate link_index before accessing dc->links[], whose capacity is limited by MAX_LINKS. The correction addresses three Coverity-reported overrun findings and one resource leak. CVSS 3.1 rates it 7.8 with local access, low complexity, low privileges, and no user interaction.

Likely exposure

Exposure is most plausible on systems running affected Linux kernels with the AMD display code present, particularly where untrusted users have local accounts. The supplied version data references Linux 4.15, 6.6.87, 6.10.9, and 6.11, but does not clearly express exact vulnerable ranges or distribution backports.

Exploitation context

CVE-2024-46813 is not listed as a CISA KEV in the supplied bundle, and no cited source confirms active exploitation or a public exploit. Its CVSS vector requires local, low-privileged access. Practical exploitability is not established by the Coverity findings alone.

Researcher notes

The source bundle provides no CWE and contains ambiguous version entries, including a duplicated commit identifier. Exact vulnerable and fixed release boundaries therefore require distribution-level verification. The stable kernel commits are the strongest supplied references for confirming whether a downstream kernel contains the bounds check.

Mitigation direction

  • Install a vendor-supported kernel containing the link_index bounds-check correction.
  • Check Linux distribution advisories for fixed package versions and backport status.
  • Prioritize multi-user systems where untrusted users can obtain local access.
  • Consult vendor guidance if an updated kernel is not yet available.

Validation and detection

  • Inventory running kernel versions and systems using AMD display hardware or drivers.
  • Compare distribution kernel sources against the three cited stable fix commits.
  • Confirm the corrected kernel is active after installation and reboot.
  • Reassess exposure using distribution-specific affected and fixed version guidance.
Prepared
Confidence
medium
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.

ATT&CK lookup starting points

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CVE-2024-46813 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
1ADP providers
4Source 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-2024-46813Attack 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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7cunaffected
LinuxLinux4.15, 0, 6.6.87, 6.10.9, 6.11affected
Weakness

CWE details

No CWE listed

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