drm/log: Fix out-of-bounds read on empty message length

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80741
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-03 13:06:13 UTC
Updated2026-09-04 05:17:14 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/log: Fix out-of-bounds read on empty message length drm_log_draw_kmsg_record() accesses s[len - 1] to strip the trailing newline, but len is unsigned int. If len is 0, the subtraction wraps to UINT_MAX, causing an out-of-bounds read. Add an early return when len is 0.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001570000 probability, percentile 0.051660000 (date 2026-09-07)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 25e2c2a3eff55683bbe77b108db2a7e389246666 16a2716910ecf7d31bf3c033ee7c506a0b00b2ee git Not specified
CNA Linux Linux affected 25e2c2a3eff55683bbe77b108db2a7e389246666 16bcea56f4205314ec2aa04a7ec74e5261d253c7 git Not specified
CNA Linux Linux affected 25e2c2a3eff55683bbe77b108db2a7e389246666 60baa179ed1333535f6e2da4133511db55278ee4 git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 semver Not specified
CNA Linux Linux unaffected 6.18.46 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.10 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/16a2716910ecf7d31bf3c033ee7c506a0b00b2ee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/60baa179ed1333535f6e2da4133511db55278ee4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/16bcea56f4205314ec2aa04a7ec74e5261d253c7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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