========================================================================== Ubuntu Security Notice USN-8039-1 February 12, 2026
libpng1.6 vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: libpng could be made to crash if it opened a specially crafted file. Software Description: - libpng1.6: PNG (Portable Network Graphics) file library Details: It was discovered that the libpng simplified API incorrectly handled quantizing RGB images. If a user or automated system were tricked into opening a specially crafted PNG file, an attacker could use this issue to cause libpng to crash, resulting in a denial of service. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 libpng16-16t64 1.6.50-1ubuntu0.4 Ubuntu 24.04 LTS libpng16-16t64 1.6.43-5ubuntu0.5 Ubuntu 22.04 LTS libpng16-16 1.6.37-3ubuntu0.4 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8039-1 CVE-2026-25646 Package Information: https://launchpad.net/ubuntu/+source/libpng1.6/1.6.50-1ubuntu0.4 https://launchpad.net/ubuntu/+source/libpng1.6/1.6.43-5ubuntu0.5 https://launchpad.net/ubuntu/+source/libpng1.6/1.6.37-3ubuntu0.4
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