# CVE-2026-13757: p11-kit: A flaw was found in p11-kit

CVE-2026-13757 is fixed in 7 products on 1 platform, first by RHSA-2026:49668, released June 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-13757
- Priority: Routine
- CVSS: 6.2 (moderate)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 23, 2026

## Description

A flaw was found in p11-kit. The RPC message attribute parsing functions p11_rpc_message_get_attribute() and p11_rpc_message_get_attribute_array_value() form a mutually-recursive call chain with no recursion depth limit when processing nested CKA_WRAP_TEMPLATE, CKA_UNWRAP_TEMPLATE, and CKA_DERIVE_TEMPLATE attributes. An unauthenticated attacker with local access to the p11-kit RPC Unix domain socket can send a specially crafted request with deeply nested template attributes, causing stack exhaustion and crashing the p11-kit server process and its dependent services.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libp11-kit0 Ubuntu 18.04.6 LTS (bionic) | 0.23.9-2ubuntu0.1+esm1 | [libp11-kit0 0.23.9-2ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libp11-kit0-0.23.9-2ubuntu0.1-esm1.md) | Sep 3, 2026 |
| Linux | libp11-kit0 Ubuntu 20.04 LTS (focal) | 0.23.20-1ubuntu0.1+esm1 | [libp11-kit0 0.23.20-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libp11-kit0-0.23.20-1ubuntu0.1-esm1.md) | Sep 3, 2026 |
| Linux | libp11-kit0 Ubuntu 22.04.1 LTS (jammy) | 0.24.0-6ubuntu0.1 | [libp11-kit0 0.24.0-6ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libp11-kit0-0.24.0-6ubuntu0.1.md) | Sep 3, 2026 |
| Linux | libp11-kit0 Ubuntu 24.04.5 LTS (noble) | 0.25.3-4ubuntu2.2 | [libp11-kit0 0.25.3-4ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libp11-kit0-0.25.3-4ubuntu2.2.md) | Sep 3, 2026 |
| Linux | p11-kit Debian 14 | 0.26.4-1 | [DEBIAN-CVE-2026-13757](https://patchblox.com/security/data/fix/linux/debian-cve-2026-13757.md) | Jul 18, 2026 |
| Linux | p11-kit RHEL 10 | 0.26.4-1.el10_2 | [RHSA-2026:49668](https://patchblox.com/security/data/fix/linux/rhsa-2026-49668.md) | Jun 23, 2026 |
| Linux | p11-kit RHEL 9 | 0:0.26.4-1.el9_8 | [RHSA-2026:49667](https://patchblox.com/security/data/fix/linux/rhsa-2026-49667.md) | Aug 5, 2026 |
| Linux | p11-kit Ubuntu 18.04.6 LTS (bionic) | 0.23.9-2ubuntu0.1+esm1 | [p11-kit 0.23.9-2ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-p11-kit-0.23.9-2ubuntu0.1-esm1.md) | Sep 3, 2026 |
| Linux | p11-kit Ubuntu 20.04 LTS (focal) | 0.23.20-1ubuntu0.1+esm1 | [p11-kit 0.23.20-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-p11-kit-0.23.20-1ubuntu0.1-esm1.md) | Sep 3, 2026 |
| Linux | p11-kit Ubuntu 22.04.1 LTS (jammy) | 0.24.0-6ubuntu0.1 | [p11-kit 0.24.0-6ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-p11-kit-0.24.0-6ubuntu0.1.md) | Sep 3, 2026 |
| Linux | p11-kit Ubuntu 24.04.5 LTS (noble) | 0.25.3-4ubuntu2.2 | [p11-kit 0.25.3-4ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-p11-kit-0.25.3-4ubuntu2.2.md) | Sep 3, 2026 |
| Linux | p11-kit almalinux 10 | 0.26.4-1.el10_2 | [ALSA-2026:49668](https://patchblox.com/security/data/fix/linux/alsa-2026-49668.md) | Aug 3, 2026 |
| Linux | p11-kit almalinux 9 | 0.26.4-1.el9_8 | [ALSA-2026:49667](https://patchblox.com/security/data/fix/linux/alsa-2026-49667.md) | Aug 3, 2026 |
| Linux | p11-kit ol 10 | 0:0.26.4-1.el10_2 | [ELSA-2026-49668](https://patchblox.com/security/data/fix/linux/elsa-2026-49668.md) | Aug 3, 2026 |
| Linux | p11-kit ol 9 | 0:0.26.4-1.el9_8 | [ELSA-2026-49667](https://patchblox.com/security/data/fix/linux/elsa-2026-49667.md) | Aug 4, 2026 |
| Linux | p11-kit opensuse-leap 16.0 | 0.25.5-160000.3.1 | [OPENSUSE-SU-2026:22105-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22105-1.md) | Nov 7, 2026 |
| Linux | p11-kit rocky 10 | 0:0.26.4-1.el10_2 | [RLSA-2026:49668](https://patchblox.com/security/data/fix/linux/rlsa-2026-49668.md) | Aug 4, 2026 |
| Linux | p11-kit rocky 9 | 0:0.26.4-1.el9_8 | [RLSA-2026:49667](https://patchblox.com/security/data/fix/linux/rlsa-2026-49667.md) | Aug 4, 2026 |
| Linux | p11-kit sles 16.0 | 0.25.5-160000.3.1 | [SUSE-SU-2026:24255-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24255-1.md) | Nov 7, 2026 |
| Linux | p11-kit-client RHEL 9 | 0:0.26.4-1.el9_8 | [RHSA-2026:49667](https://patchblox.com/security/data/fix/linux/rhsa-2026-49667.md) | Aug 5, 2026 |
| Linux | p11-kit-client almalinux 10 | 0.26.4-1.el10_2 | [ALSA-2026:49668](https://patchblox.com/security/data/fix/linux/alsa-2026-49668.md) | Aug 3, 2026 |
| Linux | p11-kit-client almalinux 9 | 0.26.4-1.el9_8 | [ALSA-2026:49667](https://patchblox.com/security/data/fix/linux/alsa-2026-49667.md) | Aug 3, 2026 |
| Linux | p11-kit-client ol 10 | 0:0.26.4-1.el10_2 | [ELSA-2026-49668](https://patchblox.com/security/data/fix/linux/elsa-2026-49668.md) | Aug 3, 2026 |
| Linux | p11-kit-client ol 9 | 0:0.26.4-1.el9_8 | [ELSA-2026-49667](https://patchblox.com/security/data/fix/linux/elsa-2026-49667.md) | Aug 4, 2026 |
| Linux | p11-kit-devel RHEL 9 | 0:0.26.4-1.el9_8 | [RHSA-2026:49667](https://patchblox.com/security/data/fix/linux/rhsa-2026-49667.md) | Aug 5, 2026 |
| Linux | p11-kit-devel almalinux 10 | 0.26.4-1.el10_2 | [ALSA-2026:49668](https://patchblox.com/security/data/fix/linux/alsa-2026-49668.md) | Aug 3, 2026 |
| Linux | p11-kit-devel almalinux 9 | 0.26.4-1.el9_8 | [ALSA-2026:49667](https://patchblox.com/security/data/fix/linux/alsa-2026-49667.md) | Aug 3, 2026 |
| Linux | p11-kit-devel ol 10 | 0:0.26.4-1.el10_2 | [ELSA-2026-49668](https://patchblox.com/security/data/fix/linux/elsa-2026-49668.md) | Aug 3, 2026 |
| Linux | p11-kit-devel ol 9 | 0:0.26.4-1.el9_8 | [ELSA-2026-49667](https://patchblox.com/security/data/fix/linux/elsa-2026-49667.md) | Aug 4, 2026 |
| Linux | p11-kit-modules Ubuntu 18.04.6 LTS (bionic) | 0.23.9-2ubuntu0.1+esm1 | [p11-kit-modules 0.23.9-2ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-p11-kit-modules-0.23.9-2ubuntu0.1-esm1.md) | Sep 3, 2026 |
| Linux | p11-kit-modules Ubuntu 20.04 LTS (focal) | 0.23.20-1ubuntu0.1+esm1 | [p11-kit-modules 0.23.20-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-p11-kit-modules-0.23.20-1ubuntu0.1-esm1.md) | Sep 3, 2026 |
| Linux | p11-kit-modules Ubuntu 22.04.1 LTS (jammy) | 0.24.0-6ubuntu0.1 | [p11-kit-modules 0.24.0-6ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-p11-kit-modules-0.24.0-6ubuntu0.1.md) | Sep 3, 2026 |
| Linux | p11-kit-modules Ubuntu 24.04.5 LTS (noble) | 0.25.3-4ubuntu2.2 | [p11-kit-modules 0.25.3-4ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-p11-kit-modules-0.25.3-4ubuntu2.2.md) | Sep 3, 2026 |
| Linux | p11-kit-server RHEL 9 | 0:0.26.4-1.el9_8 | [RHSA-2026:49667](https://patchblox.com/security/data/fix/linux/rhsa-2026-49667.md) | Aug 5, 2026 |
| Linux | p11-kit-server almalinux 10 | 0.26.4-1.el10_2 | [ALSA-2026:49668](https://patchblox.com/security/data/fix/linux/alsa-2026-49668.md) | Aug 3, 2026 |
| Linux | p11-kit-server almalinux 9 | 0.26.4-1.el9_8 | [ALSA-2026:49667](https://patchblox.com/security/data/fix/linux/alsa-2026-49667.md) | Aug 3, 2026 |
| Linux | p11-kit-server ol 10 | 0:0.26.4-1.el10_2 | [ELSA-2026-49668](https://patchblox.com/security/data/fix/linux/elsa-2026-49668.md) | Aug 3, 2026 |
| Linux | p11-kit-server ol 9 | 0:0.26.4-1.el9_8 | [ELSA-2026-49667](https://patchblox.com/security/data/fix/linux/elsa-2026-49667.md) | Aug 4, 2026 |
| Linux | p11-kit-trust RHEL 9 | 0:0.26.4-1.el9_8 | [RHSA-2026:49667](https://patchblox.com/security/data/fix/linux/rhsa-2026-49667.md) | Aug 5, 2026 |
| Linux | p11-kit-trust almalinux 10 | 0.26.4-1.el10_2 | [ALSA-2026:49668](https://patchblox.com/security/data/fix/linux/alsa-2026-49668.md) | Aug 3, 2026 |
| Linux | p11-kit-trust almalinux 9 | 0.26.4-1.el9_8 | [ALSA-2026:49667](https://patchblox.com/security/data/fix/linux/alsa-2026-49667.md) | Aug 3, 2026 |
| Linux | p11-kit-trust ol 10 | 0:0.26.4-1.el10_2 | [ELSA-2026-49668](https://patchblox.com/security/data/fix/linux/elsa-2026-49668.md) | Aug 3, 2026 |
| Linux | p11-kit-trust ol 9 | 0:0.26.4-1.el9_8 | [ELSA-2026-49667](https://patchblox.com/security/data/fix/linux/elsa-2026-49667.md) | Aug 4, 2026 |

---

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