{"id":"USN-8496-2","aliases":[],"status":"published","title":"cifs-utils regression","description":"USN-8496-1 fixed a vulnerability in cifs-utils. Unfortunately, the fix\nintroduced a regression with Kerberos mounts. This update reverts the\nsecurity update until a complete fix is available.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that cifs-utils incorrectly dropped root privileges\n before looking up user information. A local attacker could possibly use\n this issue to execute arbitrary code as the root user.","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2026-07-03T18:49:32Z","modified":"2026-07-04T02:00:06Z","fixes":[{"ecosystem":"Ubuntu:22.04:LTS","package":"cifs-utils","fixed_in":["2:6.14-1ubuntu0.5"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"cifs-utils","fixed_in":["2:7.0-2ubuntu0.4"],"sources":["osv"]},{"ecosystem":"Ubuntu:25.10","package":"cifs-utils","fixed_in":["2:7.4-1ubuntu0.25.10.2"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"cifs-utils","fixed_in":["2:7.4-1ubuntu0.26.04.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"cifs-utils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:6.14-1ubuntu0.5"}]}],"versions":["2:6.11-3.1","2:6.14-1","2:6.14-1build1","2:6.14-1ubuntu0.1","2:6.14-1ubuntu0.2","2:6.14-1ubuntu0.3","2:6.14-1ubuntu0.4"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"cifs-utils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:7.0-2ubuntu0.4"}]}],"versions":["2:7.0-2","2:7.0-2build1","2:7.0-2ubuntu0.1","2:7.0-2ubuntu0.2","2:7.0-2ubuntu0.3"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"cifs-utils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:7.4-1ubuntu0.25.10.2"}]}],"versions":["2:7.2-2","2:7.3-1","2:7.4-1","2:7.4-1ubuntu0.25.10.1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"cifs-utils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:7.4-1ubuntu0.26.04.2"}]}],"versions":["2:7.4-1","2:7.4-1build1","2:7.4-1ubuntu0.26.04.1"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-8496-2","tags":["advisory"]},{"url":"https://launchpad.net/bugs/2159053","tags":["report"]}],"sources":{"osv":[{"id":"USN-8496-2","title":"cifs-utils regression","description":"USN-8496-1 fixed a vulnerability in cifs-utils. Unfortunately, the fix\nintroduced a regression with Kerberos mounts. This update reverts the\nsecurity update until a complete fix is available.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that cifs-utils incorrectly dropped root privileges\n before looking up user information. A local attacker could possibly use\n this issue to execute arbitrary code as the root user.","status":"published","published":"2026-07-03T18:49:32Z","modified":"2026-07-04T02:00:06.067223032Z","updated_at":"2026-11-02T16:58:25.103481Z"}]}}