# CVE-2026-23269: apparmor: validate DFA start states are in bounds in unpack_pdb

CVE-2026-23269 is fixed in 19 products on 1 platform, first by DEBIAN-CVE-2026-23269, released March 18, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-23269
- Priority: High
- CVSS: 7.1 (Moderate)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 18, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23269

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | dtb-aarch64 opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-64kb opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 |
| Linux | kernel-azure sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 |
| Linux | kernel-debug opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-default opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-default sles 15.6 | 6.4.0-150600.23.112.1 | [SUSE-SU-2026:2195-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2195-1.md) | Jul 1, 2026 |
| Linux | kernel-default sles 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-default sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 |
| Linux | kernel-default-base opensuse-leap 15.6 | 6.4.0-150600.23.92.1.150600.12.42.2 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.112.1.150600.12.52.1 | [SUSE-SU-2026:2195-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2195-1.md) | Jul 1, 2026 |
| Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.92.1.150600.12.42.2 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.55.1.150700.17.33.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 |
| Linux | kernel-docs opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.112.1 | [SUSE-SU-2026:2195-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2195-1.md) | Jul 1, 2026 |
| Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 |
| Linux | kernel-kvmsmall opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-livepatch-SLE15-SP6_Update_21 sles 15.6 | 1-150600.13.5.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-livepatch-SLE15-SP6_Update_26 sles 15.6 | 1-150600.13.3.1 | [SUSE-SU-2026:2195-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2195-1.md) | Jul 1, 2026 |
| Linux | kernel-livepatch-SLE15-SP7-RT_Update_10 sles 15.7 | 1-150700.1.3.1 | [SUSE-SU-2026:0962-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0962-1.md) | Mar 23, 2026 |
| Linux | kernel-livepatch-SLE15-SP7_Update_10 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2026:1081-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1081-1.md) | Mar 26, 2026 |
| Linux | kernel-livepatch-SLE15-SP7_Update_15 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 |
| Linux | kernel-obs-build opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.112.1 | [SUSE-SU-2026:2195-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2195-1.md) | Jul 1, 2026 |
| Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 |
| Linux | kernel-obs-qa opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-source opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-source sles 15.6 | 6.4.0-150600.23.112.1 | [SUSE-SU-2026:2195-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2195-1.md) | Jul 1, 2026 |
| Linux | kernel-source sles 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-source sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 |
| Linux | kernel-syms opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.112.1 | [SUSE-SU-2026:2195-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2195-1.md) | Jul 1, 2026 |
| Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 |
| Linux | kernel-zfcpdump opensuse-leap 15.6 | 6.4.0-150600.23.92.1 | [SUSE-SU-2026:1041-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1041-1.md) | Mar 25, 2026 |
| Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.55.1 | [SUSE-SU-2026:2238-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2238-1.md) | Jun 30, 2026 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.164-1 | [DEBIAN-CVE-2026-23269](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23269.md) | Mar 18, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.74-2 | [DEBIAN-CVE-2026-23269](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23269.md) | Mar 18, 2026 |
| Linux | linux Debian 14 | 6.19.6-2 | [DEBIAN-CVE-2026-23269](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23269.md) | Mar 18, 2026 |

---

Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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