selinux: reject a class permission count below its inherited common

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80757
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-03 13:06:15 UTC
Updated2026-09-03 13:06:15 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: selinux: reject a class permission count below its inherited common security_get_permissions() maps an inherited common's permissions into an array sized by the class's own permissions.nprim, but class_read() takes that nprim verbatim from the policy image and never checks that it covers the common. A class that inherits a common of N permissions while declaring a smaller nprim is accepted, and on load the common's permissions are written past the class-sized array -- an out-of-bounds heap write. Reject a class whose permission count is below its inherited common's. Well-formed policies, where the class count already includes the inherited permissions, are unaffected.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 2002ff745db64ac83ee1bb9ff78196d2d68bfdb3 git Not specified
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 38d91446630a20ce8c2a981810deea81fd61a3b5 git Not specified
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 638213f2e6ea52c06a25861616781338d154db35 git Not specified
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7 git Not specified
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 a63011c009ea79439b800a05602b880eb4adbb05 git Not specified
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 acd5b09be98fd38b7392307880156fb0452a7276 git Not specified
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 1b995966c3ae5244751bdaee9bfe7e17567d4fbe git Not specified
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 9a82dcd98b6e6e11cfd162410967951f12152528 git Not specified
CNA Linux Linux affected 2.6.23 Not specified
CNA Linux Linux unaffected 2.6.23 semver Not specified
CNA Linux Linux unaffected 5.10.266 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.217 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.184 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.153 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.105 6.12.* 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/a63011c009ea79439b800a05602b880eb4adbb05 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2002ff745db64ac83ee1bb9ff78196d2d68bfdb3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/acd5b09be98fd38b7392307880156fb0452a7276 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1b995966c3ae5244751bdaee9bfe7e17567d4fbe 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/638213f2e6ea52c06a25861616781338d154db35 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9a82dcd98b6e6e11cfd162410967951f12152528 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/38d91446630a20ce8c2a981810deea81fd61a3b5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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