drm/ioc32: stop speculation on the drm_compat_ioctl path

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Summary

CVECVE-2026-31781
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-01 15:16:41 UTC
Updated2026-05-11 20:51:42 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/ioc32: stop speculation on the drm_compat_ioctl path The drm compat ioctl path takes a user controlled pointer, and then dereferences it into a table of function pointers, the signature method of spectre problems. Fix this up by calling array_index_nospec() on the index to the function pointer list.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

EPSS: 0.000240000 probability, percentile 0.068060000 (date 2026-05-05)

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 505b5240329b922f21f91d5b5d1e535c805eca6d 46a60ee8956ef1975f00455f614761c7ecedc09d git Not specified
CNA Linux Linux affected 505b5240329b922f21f91d5b5d1e535c805eca6d 5bb398991f378ef74d90b14a6ea8b61ff96cc03a git Not specified
CNA Linux Linux affected 505b5240329b922f21f91d5b5d1e535c805eca6d d59c5d8539662d95887b4564f3f72ad38076a2d5 git Not specified
CNA Linux Linux affected 505b5240329b922f21f91d5b5d1e535c805eca6d 489f2ef2b908898d01df697dc4fe1476674be640 git Not specified
CNA Linux Linux affected 505b5240329b922f21f91d5b5d1e535c805eca6d 4a41c2b18fc05d30b718d2602cac339eae710b34 git Not specified
CNA Linux Linux affected 505b5240329b922f21f91d5b5d1e535c805eca6d f0e441be08a2eab10b2d06fccfa267ee599dd6b3 git Not specified
CNA Linux Linux affected 505b5240329b922f21f91d5b5d1e535c805eca6d 27ef84bba9b9d7b03418c60fbc6069ea0e87b13c git Not specified
CNA Linux Linux affected 505b5240329b922f21f91d5b5d1e535c805eca6d f8995c2df519f382525ca4bc90553ad2ec611067 git Not specified
CNA Linux Linux affected abc60edcfc87771ff244763d4d19c67766f5dd0f git Not specified
CNA Linux Linux affected a2a840d6dcae960c2dfdf3fcb1b759e1b7d90663 git Not specified
CNA Linux Linux affected 00279b505289f7529d9be2e78915d0483ffbd314 git Not specified
CNA Linux Linux affected d04e6ea0cec9e7d6cba806508f657d2d0dc6cacf git Not specified
CNA Linux Linux affected 7f3ebea19795eb38438cd3709fabf2afd53cf447 git Not specified
CNA Linux Linux affected 4.20 Not specified
CNA Linux Linux unaffected 4.20 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.168 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.134 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.81 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.22 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.12 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/5bb398991f378ef74d90b14a6ea8b61ff96cc03a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/489f2ef2b908898d01df697dc4fe1476674be640 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/46a60ee8956ef1975f00455f614761c7ecedc09d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f8995c2df519f382525ca4bc90553ad2ec611067 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f0e441be08a2eab10b2d06fccfa267ee599dd6b3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/27ef84bba9b9d7b03418c60fbc6069ea0e87b13c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4a41c2b18fc05d30b718d2602cac339eae710b34 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d59c5d8539662d95887b4564f3f72ad38076a2d5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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