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CVE Record

CVE-2024-27029: drm/amdgpu: fix mmhub client id out-of-bounds access

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix mmhub client id out-of-bounds access Properly handle cid 0x140.

HighCVSS 7.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux AMD graphics driver flaw can access memory outside its intended bounds when handling a specific client identifier. The CVSS assessment indicates that a local, low-privileged user could potentially expose sensitive information or disrupt the system without user interaction. No integrity impact is identified.

Executive priority

Treat this as a high-priority kernel update for shared, multi-user, or sensitive AMD GPU systems. Other systems should follow their normal urgent security-patching cycle after verifying exposure. The local attack requirement reduces remote risk, but the assessed confidentiality and availability impacts remain significant.

Technical view

The amdgpu DRM driver's MMHUB client-ID handling did not properly process client ID 0x140, resulting in an out-of-bounds access. It is scored CVSS 3.1 7.1 with local access, low complexity, low privileges, no user interaction, and high confidentiality and availability impacts.

Likely exposure

Likely exposure is limited to Linux systems using the affected amdgpu driver. The bundle lists 6.7, 0, 6.7.11, 6.8.2, and 6.9 as affected values, but does not preserve clear range semantics. Confirm exact vulnerable kernel builds through distribution or vendor guidance.

Exploitation context

The bundle states that this CVE is not in KEV and provides no evidence of active exploitation or a public exploit. The CVSS vector describes a local, low-privileged attack path. Practical exploitability and required hardware or runtime conditions are not documented in the supplied sources.

Researcher notes

The supplied record establishes an amdgpu MMHUB out-of-bounds access involving client ID 0x140, but does not describe the accessed structure, reachable data, trigger conditions, hardware generations, or observed crash behavior. The affected-version representation is ambiguous, so commit inclusion and distribution advisories are more reliable validation criteria than version-string assumptions.

Mitigation direction

  • Install a distribution or vendor kernel update containing the applicable referenced stable fix.
  • Prioritize shared or multi-user systems where untrusted users can access AMD GPU resources.
  • Reduce untrusted local access to potentially exposed AMD GPU hosts until updates are applied.
  • Consult kernel and distribution guidance before relying on any temporary workaround.

Validation and detection

  • Inventory Linux hosts with AMD GPUs and determine whether the amdgpu driver is active.
  • Record each host's exact kernel package, build, and distribution security status.
  • Confirm the installed kernel includes an applicable referenced stable fix.
  • Review relevant kernel and amdgpu fault logs; absence of errors does not establish safety.
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-2024-27029 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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
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
7.1CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H1.85.2Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.1High
CVSS 3.1 vector shape for CVE-2024-27029Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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
LinuxLinuxaba2be41470a11629c8378c3651323d7e5416df6, aba2be41470a11629c8378c3651323d7e5416df6, aba2be41470a11629c8378c3651323d7e5416df6unaffected
LinuxLinux6.7, 0, 6.7.11, 6.8.2, 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.