selinux: reject an unclaimed class value in security_get_classes() (CVE-2026-80912) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80912

selinux: reject an unclaimed class value in security_get_classes()

Answer in brief

CVE-2026-80912 records a Unknown severity vulnerability in selinux: reject an unclaimed class value in security_get_classes(). 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 4, 2026Updated Sep 4, 2026Source checked Sep 4, 2026First seen by HOL Sep 4, 2026Material review Sep 4, 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 <e0285bb152211c00900136b66d4b420c14a59094 \|\| >=55fcf09b3fe4325c9395ebbb0322a547a157ebc7 <099869e9343a5f8c22b58497f074b34f63cbf856 \|\| >=55fcf09b3fe4325c9395ebbb0322a547a157ebc7 <841aea4d5a25e16273d04cd07a74142b4687e03b \|\| >=55fcf09b3fe4325c9395ebbb0322a547a157ebc7 <d8a10899ea3c84b80de72ca8ee9039e9a5156c9a \|\| >=55fcf09b3fe4325c9395ebbb0322a547a157ebc7 <22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd	e0285bb152211c00900136b66d4b420c14a59094, 099869e9343a5f8c22b58497f074b34f63cbf856, 841aea4d5a25e16273d04cd07a74142b4687e03b, d8a10899ea3c84b80de72ca8ee9039e9a5156c9a, 22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd
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 e0285bb152211c00900136b66d4b420c14a59094 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 4, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: selinux: reject an unclaimed class value in security_get_classes() security_get_classes() sizes an array by p_classes.nprim and fills it at value - 1, so a class value the policy never defines leaves a NULL. sel_make_classes() passes every entry to sel_make_dir(), reaching the same d_alloc_name() dereference as the permission array. The class symbol table is allowed to be sparse (policydb_class_isvalid() exists to absorb that), but this getter builds its own array straight from the hash table and has no such predicate. Fail the lookup when a value went unclaimed instead of handing out the NULL. Conforming policies define every class they declare and are unaffected.

Quoted source text, attributed separately from HOL analysis.