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NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Fixed version: Linux Linux 1b995966c3ae5244751bdaee9bfe7e17567d4fbe, 2002ff745db64ac83ee1bb9ff78196d2d68bfdb3, 2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 1b995966c3ae5244751bdaee9bfe7e17567d4fbe, 2002ff745db64ac83ee1bb9ff78196d2d68bfdb3, 2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Sep 3, 2026
Updated
Sep 3, 2026
EPSS
0.1% · 5th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.23affected
    • 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and later · before 2002ff745db64ac83ee1bb9ff78196d2d68bfdb3affected · git
    • 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and later · before 38d91446630a20ce8c2a981810deea81fd61a3b5affected · git
    • 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and later · before 638213f2e6ea52c06a25861616781338d154db35affected · git
    • 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and later · before 2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7affected · git
    • 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and later · before a63011c009ea79439b800a05602b880eb4adbb05affected · git
    • 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and later · before acd5b09be98fd38b7392307880156fb0452a7276affected · git
    • 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and later · before 1b995966c3ae5244751bdaee9bfe7e17567d4fbeaffected · git
    • 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and later · before 9a82dcd98b6e6e11cfd162410967951f12152528affected · git
    • before 2.6.23not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.10-17.1.10-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-80753Sep 3, 2026 · ovpn: run deferred work on a module-owned workqueue
    33Monitor
  • ← EarlierCVE-2026-80756Sep 3, 2026 · selinux: do not cancel a policy conversion that never started
    0Monitor
  • Later →CVE-2026-80728Sep 3, 2026 · Revert "drm/amdgpu: fix aperture mapping leak"
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux1b995966c3ae5244751bdaee9bfe7e17567d4fbeVendor (CNA)
Linux Linux2002ff745db64ac83ee1bb9ff78196d2d68bfdb3Vendor (CNA)
Linux Linux2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7Vendor (CNA)
Linux Linux38d91446630a20ce8c2a981810deea81fd61a3b5Vendor (CNA)
Linux Linux638213f2e6ea52c06a25861616781338d154db35Vendor (CNA)
Linux Linux9a82dcd98b6e6e11cfd162410967951f12152528Vendor (CNA)
Linux Linuxa63011c009ea79439b800a05602b880eb4adbb05Vendor (CNA)
Linux Linuxacd5b09be98fd38b7392307880156fb0452a7276Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records