A vulnerability (CVE-2026-42046, CVSS 7.8 HIGH) in libcaca allows an attacker to cause a denial of service or potentially execute arbitrary code by tricking a user into opening a specially crafted file. The flaw is present in libcaca packages for Ubuntu 22.04 LTS, 24.04 LTS, 25.10, and 26.04 LTS. The issue is corrected by updating to the specific patched package versions listed in the USN, such as libcaca0 version 0.99.beta20-6ubuntu2.1 for Ubuntu 26.04 LTS.
Ubuntu Security Notices USN-8318-1 USN-8318-1: libcaca vulnerability Publication date 27 May 2026 Overview libcaca could be made to crash or run programs as your login if it opened a specially crafted file. Releases 26.04 LTS 25.10 24.04 LTS 22.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Packages libcaca - text mode graphics utilities Details It was discovered that libcaca incorrectly handled certain malformed files. An attacker could use this issue to cause libcaca to crash, resulting in a denial of service, or possibly execute arbitrary code. It was discovered that libcaca incorrectly handled certain malformed files. An attacker could use this issue to cause libcaca 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 caca-utils – 0.99.beta20-6ubuntu2.1 libcaca0 – 0.99.beta20-6ubuntu2.1 25.10 questing caca-utils – 0.99.beta20-5ubuntu0.25.10.2 libcaca0 – 0.99.beta20-5ubuntu0.25.10.2 24.04 LTS noble caca-utils – 0.99.beta20-4ubuntu0.2 libcaca0 – 0.99.beta20-4ubuntu0.2 22.04 LTS jammy caca-utils – 0.99.beta19-2.2ubuntu4.2 libcaca0 – 0.99.beta19-2.2ubuntu4.2 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-2026-42046 CVE-2026-42046