selinux: reject a permission value exceeding the class permission count
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]
CVE-2026-80755
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-80755
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
"lessThan": "9a1bd9fd1326655dfc31b18ca92ea8433cb31204",
"versionType": "git"
},
{
"status": "affected",
"version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
"lessThan": "6c2ab7c4549f4f2305848df834e784651dbf1676",
"versionType": "git"
},
{
"status": "affected",
"version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
"lessThan": "dfc59a062c386d3d4415ecdab781065a645f33cc",
"versionType": "git"
},
{
"status": "affected",
"version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
"lessThan": "a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e",
"versionType": "git"
},
{
"status": "affected",
"version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
"lessThan": "d14b5d0e97fccd27974fedc03b903408872907fd",
"versionType": "git"
}
],
"programFiles": [
"security/selinux/ss/policydb.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.23"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.23",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.108",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.49",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.13",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"security/selinux/ss/policydb.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80755
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46636 · Revision 1
- Added to Heist Feed
- Publisher date