selinux: reject a permission value exceeding the class permission count

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80755
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 permission value exceeding the class permission count perm_read() bounds a permission value by SEL_VEC_MAX but never by the nprim of the owning class or common, which is taken verbatim from the policy image. security_get_permissions() then writes perms[value - 1] into an nprim-sized kcalloc() array, so a class declaring fewer permissions than its largest permission value drives an out-of-bounds heap write. The top-level symbol tables are validated this way; the nested per-class permission table is not. Reject a permission whose value exceeds nprim, which is already set when perm_read() runs. Well-formed policies are unaffected. [PM: tweak comment for line length]

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.098490000 (date 2026-09-07)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 6c2ab7c4549f4f2305848df834e784651dbf1676 git Not specified
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 dfc59a062c386d3d4415ecdab781065a645f33cc git Not specified
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e git Not specified
CNA Linux Linux affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 d14b5d0e97fccd27974fedc03b903408872907fd 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 6.12.108 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.49 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.13 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6c2ab7c4549f4f2305848df834e784651dbf1676 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d14b5d0e97fccd27974fedc03b903408872907fd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dfc59a062c386d3d4415ecdab781065a645f33cc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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