selinux: reject a permission value exceeding the class permission count (CVE-2026-80755) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80755

selinux: reject a permission value exceeding the class permission count

Answer in brief

CVE-2026-80755 records a Unknown severity vulnerability in selinux: reject a permission value exceeding the class permission count. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 3, 2026Updated Sep 3, 2026Source checked Sep 3, 2026First seen by HOL Sep 3, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=55fcf09b3fe4325c9395ebbb0322a547a157ebc7 <6c2ab7c4549f4f2305848df834e784651dbf1676 \|\| >=55fcf09b3fe4325c9395ebbb0322a547a157ebc7 <dfc59a062c386d3d4415ecdab781065a645f33cc \|\| >=55fcf09b3fe4325c9395ebbb0322a547a157ebc7 <a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e \|\| >=55fcf09b3fe4325c9395ebbb0322a547a157ebc7 <d14b5d0e97fccd27974fedc03b903408872907fd	6c2ab7c4549f4f2305848df834e784651dbf1676, dfc59a062c386d3d4415ecdab781065a645f33cc, a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e, d14b5d0e97fccd27974fedc03b903408872907fd
Linux/Linuxgeneric	2.6.23	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 6c2ab7c4549f4f2305848df834e784651dbf1676 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 3, 2026

Sources and claim methodology

Upstream source description

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]

Quoted source text, attributed separately from HOL analysis.