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CVE Record

CVE-2024-42117: drm/amd/display: ASSERT when failing to find index by plane/stream id

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: ASSERT when failing to find index by plane/stream id [WHY] find_disp_cfg_idx_by_plane_id and find_disp_cfg_idx_by_stream_id returns an array index and they return -1 when not found; however, -1 is not a valid index number. [HOW] When this happens, call ASSERT(), and return a positive number (which is fewer than callers' array size) instead. This fixes 4 OVERRUN and 2 NEGATIVE_RETURNS 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 Linux kernel flaw in AMD display handling can produce an invalid array index when a display plane or stream identifier is missing. This may cause memory-safety failures. The supplied CVSS score is 7.8, but the sources provide no evidence of active exploitation or a remotely reachable attack path.

Executive priority

Treat this as a high-priority patch-management issue for affected Linux endpoints with AMD graphics, particularly multi-user systems. It does not warrant emergency incident response solely from the supplied evidence because no active exploitation is reported. Validate distribution backports promptly and schedule supported kernel updates according to endpoint exposure and operational risk.

Technical view

Two AMD display functions could return -1 when an identifier was not found, although callers expected a valid array index. Coverity reported four overrun and two negative-return issues. The kernel fix adds an assertion and returns a bounded positive index. The supplied vector describes local, low-complexity exploitation requiring low privileges and no user interaction.

Likely exposure

Potential exposure is limited to systems running the listed affected Linux kernel versions, including 6.7, 6.9.9, and 6.10, where the AMD display code is present and reachable. The bundle does not establish which distributions backported the correction or whether systems without active AMD graphics are practically exposed.

Exploitation context

The supplied CVSS vector rates potential confidentiality, integrity, and availability impact as high. However, this CVE is not listed as KEV, and the provided sources do not report active exploitation, public weaponization, or a confirmed real-world attack. Exploitation is characterized as local and requires low privileges.

Researcher notes

The reported defect concerns invalid index handling rather than a source-confirmed exploit primitive. Coverity identified overrun and negative-return conditions, while the fix substitutes a bounded positive value after asserting. The bundle does not document trigger prerequisites, reachable call paths, crash evidence, distribution-specific status, or demonstrated control of memory corruption; those gaps limit exploitability conclusions.

Mitigation direction

  • Update to a vendor-supported kernel containing the referenced upstream or stable correction.
  • Check distribution advisories for backported fixes before relying only on the displayed kernel version.
  • Prioritize affected endpoints where AMD graphics and untrusted local users or workloads coexist.
  • Follow vendor guidance if an immediate patched kernel is unavailable.

Validation and detection

  • Inventory Linux kernel versions and identify systems using AMD display hardware or drivers.
  • Confirm whether vendor kernel packages include either referenced correction or an equivalent backport.
  • Reassess systems reporting versions listed as affected in the CVE record.
  • Monitor kernel and distribution advisories for revised affected-version or remediation information.
Prepared
Confidence
high
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.

ATT&CK lookup starting points

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CVE-2024-42117 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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-2024-42117Attack 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
LinuxLinux7966f319c66d9468623c6a6a017ecbc0dd79be75, 7966f319c66d9468623c6a6a017ecbc0dd79be75unaffected
LinuxLinux6.7, 0, 6.9.9, 6.10affected
Weakness

CWE details

No CWE listed

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