A parsing vulnerability (CVE-2026-56109, CVSS 6.8) in alsa-lib allows an attacker to cause a denial of service or potentially execute arbitrary code by tricking a user or process into opening a specially crafted ALSA configuration file. The vulnerability affects Ubuntu LTS releases 22.04, 24.04, and 26.04, and is remediated by updating to specific package versions, including libasound2 version 1.2.6.1-1ubuntu1.2 for Jammy 22.04 LTS.
Ubuntu Security Notices USN-8538-1 USN-8538-1: alsa-lib vulnerability Publication date 14 July 2026 Overview alsa-lib could be made to crash or run programs as your login if it opened a specially crafted file. Releases 26.04 LTS 24.04 LTS 22.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Packages alsa-lib - shared library for ALSA applications Details It was discovered that alsa-lib incorrectly handled certain ALSA configuration text. An attacker could use this issue to cause alsa-lib to crash, resulting in a denial of service, or possibly execute arbitrary code. It was discovered that alsa-lib incorrectly handled certain ALSA configuration text. An attacker could use this issue to cause alsa-lib to crash, resulting in a denial of service, or possibly execute arbitrary code. 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 26.04 LTS resolute libasound2t64 – 1.2.15.3-1ubuntu1.1 24.04 LTS noble libasound2t64 – 1.2.11-1ubuntu0.3 22.04 LTS jammy libasound2 – 1.2.6.1-1ubuntu1.2 Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. Get Ubuntu Pro References CVE-2026-56109 CVE-2026-56109