[USN-8173-1] polkit vulnerabilities

========================================================================== Ubuntu Security Notice USN-8173-1 April 14, 2026 policykit-1 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in polkit. Software Description: - policykit-1: framework for managing administrative policies and privileges Details: It was discovered that polkit incorrectly handled nested elements in XML policy files. If an administrator were tricked into installing a malicious policy file, a remote attacker could possibly use this issue to cause polkit to crash, resulting in a denial of service. (CVE-2025-7519) Pavel Kohout discovered that the polkit polkit-agent-helper-1 utility incorrectly handled long input. A local attacker could possibly use this issue to cause polkit to crash, resulting in a denial of service. (CVE-2026-4897) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 polkitd 126-2ubuntu0.1 Ubuntu 24.04 LTS policykit-1 124-2ubuntu1.24.04.3 Ubuntu 22.04 LTS policykit-1 0.105-33ubuntu0.1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8173-1 CVE-2025-7519, CVE-2026-4897 Package Information: https://launchpad.net/ubuntu/+source/policykit-1/126-2ubuntu0.1 https://launchpad.net/ubuntu/+source/policykit-1/124-2ubuntu1.24.04.3 https://launchpad.net/ubuntu/+source/policykit-1/0.105-33ubuntu0.1