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CVE Record

CVE-2024-26699: drm/amd/display: Fix array-index-out-of-bounds in dcn35_clkmgr

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix array-index-out-of-bounds in dcn35_clkmgr [Why] There is a potential memory access violation while iterating through array of dcn35 clks. [How] Limit iteration per array size.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux AMD display-driver flaw can access memory outside an array while processing DCN35 clock data. A local, low-privileged attacker may potentially compromise confidentiality, integrity, or availability. The supplied record rates it 7.8 High, but provides no evidence of active exploitation.

Executive priority

Treat as a high-priority endpoint patching issue, especially for multi-user systems using relevant AMD graphics. Local privileges are required, reducing remote exposure, but the stated potential impact is severe. Expedite validated kernel updates according to vendor guidance.

Technical view

CVE-2024-26699 is an array-index-out-of-bounds condition in drm/amd/display's dcn35_clkmgr. Iteration over the DCN35 clock array could exceed its bounds, causing a potential memory-access violation. The upstream fix limits iteration to the array size. The supplied affected range identifies Linux 6.7 through 6.7.6 and 6.8.

Likely exposure

Exposure is most likely on systems running the listed Linux versions where the affected AMD DCN35 display code is used. The bundle does not establish exact hardware prerequisites, distribution backport status, or whether every listed kernel configuration is reachable.

Exploitation context

The CVSS vector describes local access, low complexity, low privileges, no user interaction, and potentially high confidentiality, integrity, and availability impact. The CVE is not listed as KEV, and the supplied sources do not report exploitation in the wild or a public exploit.

Researcher notes

The root issue is insufficient bounds control during DCN35 clock-array iteration; the fix constrains iteration by array size. No CWE is supplied. The source bundle lacks crash traces, triggering conditions, hardware mapping, exploitability analysis, and backport coverage, so practical reachability requires environment-specific validation.

Mitigation direction

  • Install a vendor-supported kernel containing the referenced stable fix or an equivalent backport.
  • Check distribution or appliance vendor guidance for the exact corrected package version.
  • Prioritize systems using the affected AMD display path and restrict unnecessary local access until updated.

Validation and detection

  • Inventory running kernel versions and identify systems within the supplied affected range.
  • Determine whether the AMD DCN35 display-driver path is present and used.
  • Verify the installed kernel includes either referenced fix commit or a documented vendor backport.
  • After updating, confirm systems boot successfully and the corrected kernel is running.
Prepared
Confidence
medium
Sources
4

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-2024-26699 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
3Source 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-2024-26699Attack 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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux8774029f76b9806f2f3586bb0502408076767fd5, 8774029f76b9806f2f3586bb0502408076767fd5unaffected
LinuxLinux6.7, 0, 6.7.6, 6.8affected
Weakness

CWE details

No CWE listed

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