7.1

CVE-2026-23269: linux Out-of-bounds Read

CVSS: 7.1v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-23269DEBIAN-CVE-2026-23269
Published 18-03-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-23269 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 2.7% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.14%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 24 · Related 25
LSN-0119-1SUSE-SU-2026:0961-1SUSE-SU-2026:0962-1SUSE-SU-2026:0984-1SUSE-SU-2026:1003-1SUSE-SU-2026:1041-1

Timeline

  1. 18-03-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

+0.01 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu156 products
  • linuxAll versions (No fix recorded) | < 4.15.0-249.261 | < 5.4.0-227.247 | < 5.15.0-173.183 | < 6.8.0-106.106 | < 6.17.0-19.19
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1191.204 | < 5.4.0-1156.166 | < 5.15.0-1103.110 | < 6.8.0-1050.53 | < 6.17.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ ad5ff3db53c68c2f12936bc74ea5dfe0af943592, < f43eea8ae0102ea198da211ef7f5ce83725ecf19 | ≥ ad5ff3db53c68c2f12936bc74ea5dfe0af943592, < 5487871b2b56c19d26936ed6fdc62652b30941df | ≥ ad5ff3db53c68c2f12936bc74ea5dfe0af943592, < 5443c027ec16afa55b1b8a3e7a1ab2ea3c77767a | ≥ ad5ff3db53c68c2f12936bc74ea5dfe0af943592, < 07cf6320f40ea2ccfad63728cff34ecb309d03da | ≥ ad5ff3db53c68c2f12936bc74ea5dfe0af943592, < 15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c | ≥ ad5ff3db53c68c2f12936bc74ea5dfe0af943592, < 0baadb0eece2c4d939db10d3c323b4652ac79a58 | ≥ ad5ff3db53c68c2f12936bc74ea5dfe0af943592, < 3bb7db43e32190c973d4019037cedb7895920184 | ≥ ad5ff3db53c68c2f12936bc74ea5dfe0af943592, < 9063d7e2615f4a7ab321de6b520e23d370e58816 | 3.4
  • linux_kernel≥ 3.4, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.169 | ≥ 6.2, < 6.6.130 | ≥ 6.7, < 6.12.77 | ≥ 6.13, < 6.18.18 | ≥ 6.19, < 6.19.8 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3
Debian1 product
  • linux< 6.1.164-1 | < 6.12.74-2 | < 6.19.6-2

3 vendors · 159 products

References

29 links
Show all 29 references