CVE-2026-80755 (GCVE-0-2026-80755)

Vulnerability from cvelistv5 – Published: 2026-09-03 08:26 – Updated: 2026-10-30 12:31
VLAI
Title
selinux: reject a permission value exceeding the class permission count
Summary
In 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]
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 , < 766051751cfb90fc9c29c30c2943b0f24eda9594 (git)
Affected: 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 , < 9a1bd9fd1326655dfc31b18ca92ea8433cb31204 (git)
Affected: 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 , < 6c2ab7c4549f4f2305848df834e784651dbf1676 (git)
Affected: 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 , < dfc59a062c386d3d4415ecdab781065a645f33cc (git)
Affected: 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 , < a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e (git)
Affected: 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 , < d14b5d0e97fccd27974fedc03b903408872907fd (git)
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Linux Linux Affected: 2.6.23
Unaffected: 0 , < 2.6.23 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.108 , ≤ 6.12.* (semver)
Unaffected: 6.18.49 , ≤ 6.18.* (semver)
Unaffected: 7.1.13 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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}



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