Unknown

CVE-2026-80757 — selinux: reject a class permission count below its inherited common

In the Linux kernel, the following vulnerability has been resolved: selinux: reject a class permission count below its inherited common security_get_permissions() maps an inherited common's permissions into an array sized by the class's own permissions.nprim, but class_read() takes that nprim verbatim from the policy image and never checks that it covers the common. A class that inherits a common of N permissions while declaring a smaller nprim is accepted, and on load the common's permissions are written past the class-sized array -- an out-of-bounds heap write. Reject a class whose permission count is below its inherited common's. Well-formed policies, where the class count already includes the inherited permissions, are unaffected.

Published Sep 3, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.17%

ahead of 6% of scored CVEs · Oct 26, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and < 2002ff745db64ac83ee1bb9ff78196d2d68bfdb3≥ 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and < 38d91446630a20ce8c2a981810deea81fd61a3b5≥ 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and < 638213f2e6ea52c06a25861616781338d154db35≥ 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and < 2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7≥ 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and < a63011c009ea79439b800a05602b880eb4adbb05≥ 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and < acd5b09be98fd38b7392307880156fb0452a7276≥ 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and < 1b995966c3ae5244751bdaee9bfe7e17567d4fbe≥ 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and < 9a82dcd98b6e6e11cfd162410967951f12152528 and 1 more version 2.6.23	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 26, 2026 · 11 reading(s) · max 0.17%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 3, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7
NIST National Vulnerability Database
git.kernel.org/stable/c/9a82dcd98b6e6e11cfd162410967951f12152528
NIST National Vulnerability Database
git.kernel.org/stable/c/38d91446630a20ce8c2a981810deea81fd61a3b5
NIST National Vulnerability Database
git.kernel.org/stable/c/638213f2e6ea52c06a25861616781338d154db35
NIST National Vulnerability Database
git.kernel.org/stable/c/acd5b09be98fd38b7392307880156fb0452a7276
NIST National Vulnerability Database
git.kernel.org/stable/c/2002ff745db64ac83ee1bb9ff78196d2d68bfdb3
NIST National Vulnerability Database
git.kernel.org/stable/c/a63011c009ea79439b800a05602b880eb4adbb05
NIST National Vulnerability Database
git.kernel.org/stable/c/1b995966c3ae5244751bdaee9bfe7e17567d4fbe
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-99092 riscv: patch: fix handling of bpf-jit execmem addresses 23h
Unknown CVE-2026-99093 mm: don't schedule deferred kernel page table freeing while booting 23h
Unknown CVE-2026-99095 drm/vc4: drain the hangcheck timer and works on V3D unbind 23h
Unknown CVE-2026-99096 io_uring/register: don't exempt disabled rings from task restrictions 23h
Unknown CVE-2026-99097 tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper() 23h
Unknown CVE-2026-99098 dm-integrity: fix buffer overflow in inline mode with large tag size 23h

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-80757 is "selinux: reject a class permission count below its inherited common", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.17% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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