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VulnerabilityCVE-2026-23269Published 2026-03-18

CVE-2026-23269 — Linux

highPublic exploit1 PoC repo

As of 2026-08-05, CVE-2026-23269 is a HIGH-severity vulnerability in Linux, CVSS v3.1 7.1, EPSS 0.1% (2.3th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-23269, most recently “Linux Kernel LPE Surge: Copy Fail (CVE-2026-31431), Dirty Frag/Fragnesia (CVE-2026-43284/CVE-2026-43500/CVE-2026-46300), and CrackArmor AppArmor Flaws vs. Defense-in-Depth Mitigations”.

CVSS v3.1
7.1/10High
EPSS
0.1%Higher than 2.3% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
1Campaigns referencing it
Priority
5.6/10Threadlinqs triage score
Published
Updated 2026-08-05
CVSS v3.1 7.1 (HIGH) · EPSS 0.1% (higher than 2.3% of all scored CVEs) · Priority 5.6/10 · Published 2026-03-18

Last updated:

What is CVE-2026-23269?

In the Linux kernel, the following vulnerability has been resolved: apparmor: validate DFA start states are in bounds in unpack_pdb Start states are read from untrusted data and used as indexes into the DFA state tables. The aa_dfa_next() function call in unpack_pdb() will access dfa->tables[YYTD_ID_BASE][start], and if the start state exceeds the number of states in the DFA, this results in an out-of-bound read. ================================================================== BUG: KASAN: slab-out-of-bounds in aa_dfa_next+0x2a1/0x360 Read of size 4 at addr ffff88811956fb90 by task su/1097 ... Reject policies with out-of-bounds start states during unpacking to prevent the issue.

The record classifies CVE-2026-23269 under weakness class CWE-125. Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 221 days ago.

Severity and exploitation probability

CVSS v3.1 base score
7.1 — HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS (FIRST)
0.1% probability of exploitation in the next 30 days, higher than 2.3% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
5.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-03-18, last modified 2026-08-05

Is CVE-2026-23269 being exploited?

Weaponised exploit code for CVE-2026-23269 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 14 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-23269

The record marks a vendor fix as available for CVE-2026-23269. Patch reference: https://git.kernel.org/stable/c/07cf6320f40ea2ccfad63728cff34ecb309d03da. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2026-23269

1 tracked threat in the Threadlinqs corpus references CVE-2026-23269, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Other references

Showing 5 of 9 recorded references.