USN-8687-1: p11-kit vulnerabilities

Publication date

27 August 2026

Overview

p11-kit could be made to crash if it received specially crafted input.


Packages

Details

It was discovered that p11-kit incorrectly handled certain RPC messages. A
local attacker could use this issue to cause p11-kit to crash, resulting in
a denial of service. (CVE-2026-13757)

It was discovered that p11-kit incorrectly handled nested attribute
decoding on 32-bit systems. A local attacker could use this issue to cause
p11-kit to crash, resulting in a denial of service. (CVE-2026-18938)

It was discovered that p11-kit incorrectly handled certain RPC messages. A
local attacker could use this issue to cause p11-kit to crash, resulting in
a denial of service. (CVE-2026-13757)

It was discovered that p11-kit incorrectly handled nested attribute
decoding on 32-bit systems. A local attacker could use this issue to cause
p11-kit to crash, resulting in a denial of service. (CVE-2026-18938)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
24.04 LTS noble libp11-kit0 –  0.25.3-4ubuntu2.2
p11-kit –  0.25.3-4ubuntu2.2
p11-kit-modules –  0.25.3-4ubuntu2.2
22.04 LTS jammy libp11-kit0 –  0.24.0-6ubuntu0.1
p11-kit –  0.24.0-6ubuntu0.1
p11-kit-modules –  0.24.0-6ubuntu0.1
20.04 LTS focal libp11-kit0 –  0.23.20-1ubuntu0.1+esm1  
p11-kit –  0.23.20-1ubuntu0.1+esm1  
p11-kit-modules –  0.23.20-1ubuntu0.1+esm1  
18.04 LTS bionic libp11-kit0 –  0.23.9-2ubuntu0.1+esm1  
p11-kit –  0.23.9-2ubuntu0.1+esm1  
p11-kit-modules –  0.23.9-2ubuntu0.1+esm1  

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