========================================================================== Ubuntu Security Notice USN-8496-3 July 13, 2026
cifs-utils vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: cifs-utils could be made to run programs as an administrator. Software Description: - cifs-utils: Common Internet File System utilities Details: USN-8496-1 fixed vulnerabilities in cifs-utils. The update caused a regression and was backed out in USN-8496-2. This update reintroduces the security fix, along with a fix for the regression. Original advisory details: It was discovered that cifs-utils incorrectly dropped root privileges before looking up user information. A local attacker could possibly use this issue to execute arbitrary code as the root user. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS cifs-utils 2:7.4-1ubuntu0.26.04.3 Ubuntu 24.04 LTS cifs-utils 2:7.0-2ubuntu0.5 Ubuntu 22.04 LTS cifs-utils 2:6.14-1ubuntu0.6 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8496-3 https://ubuntu.com/security/notices/USN-8496-2 https://ubuntu.com/security/notices/USN-8496-1 CVE-2026-12505 Package Information: https://launchpad.net/ubuntu/+source/cifs-utils/2:7.4-1ubuntu0.26.04.3 https://launchpad.net/ubuntu/+source/cifs-utils/2:7.0-2ubuntu0.5 https://launchpad.net/ubuntu/+source/cifs-utils/2:6.14-1ubuntu0.6
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