========================================================================== Ubuntu Security Notice USN-8193-1 April 21, 2026
libcap2 vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: libcap could be made to modify capabilities on arbitrary files. Software Description: - libcap2: POSIX 1003.1e capabilities library Details: Ali Raza discovered that libcap incorrectly handled file capability updates. A local attacker could possibly use this issue to inject or strip capabilities into arbitrary executables and escalate privileges. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 libcap2 1:2.75-7ubuntu2.2 libcap2-bin 1:2.75-7ubuntu2.2 Ubuntu 24.04 LTS libcap2 1:2.66-5ubuntu2.4 libcap2-bin 1:2.66-5ubuntu2.4 Ubuntu 22.04 LTS libcap2 1:2.44-1ubuntu0.22.04.3 libcap2-bin 1:2.44-1ubuntu0.22.04.3 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8193-1 CVE-2026-4878 Package Information: https://launchpad.net/ubuntu/+source/libcap2/1:2.75-7ubuntu2.2 https://launchpad.net/ubuntu/+source/libcap2/1:2.66-5ubuntu2.4 https://launchpad.net/ubuntu/+source/libcap2/1:2.44-1ubuntu0.22.04.3
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