{"id":"USN-7851-2","aliases":[],"status":"published","title":"runc-app, runc-stable regression","description":"USN-7851-1 fixed vulnerabilities in runC. The introduction of a new\nupstream release has caused regressions in runc-app and runc-stable.\nThis update fixes the problem.\n\nOriginal advisory details:\n\n Lei Wang and Li Fubang discovered that runC incorrectly handled masked\n paths. An attacker could possibly replace a container's /dev/null\n with a symlink to some other procfs file and possibly escape a container.\n (CVE-2025-31133)\n\n Lei Wang and Li Fubang discovered that runC incorrectly handled the\n /dev/console bind-mounts. An attacker could potentially exploit this issue\n to build-mount a symlink and escape a container. (CVE-2025-52565)\n\n Li Fubang and Tõnis Tiigi discovered that the fix for CVE-2019-16884 was\n incomplete. An attacker could possibly use this issue to cause a denial of\n service or escape the container. (CVE-2025-52881)","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2025-11-24T11:21:36Z","modified":"2026-02-10T04:50:20Z","fixes":[{"ecosystem":"Ubuntu:22.04:LTS","package":"runc-app","fixed_in":["1.3.3-0ubuntu1~22.04.3"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"runc-app","fixed_in":["1.3.3-0ubuntu1~24.04.3"],"sources":["osv"]},{"ecosystem":"Ubuntu:25.10","package":"runc-app","fixed_in":["1.3.3-0ubuntu1~25.10.3"],"sources":["osv"]},{"ecosystem":"Ubuntu:25.10","package":"runc-stable","fixed_in":["1.3.3-0ubuntu1~25.10.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"runc-app","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.3-0ubuntu1~22.04.3"}]}],"versions":["1.1.12-0ubuntu2~22.04.1","1.2.5-0ubuntu1~22.04.1","1.3.0-0ubuntu2~22.04.1","1.3.3-0ubuntu1~22.04.2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"runc-app","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.3-0ubuntu1~24.04.3"}]}],"versions":["1.1.10-0ubuntu1","1.1.12-0ubuntu1","1.1.12-0ubuntu2","1.1.12-0ubuntu3","1.1.12-0ubuntu3.1","1.2.5-0ubuntu1~24.04.1","1.3.0-0ubuntu2~24.04.1","1.3.3-0ubuntu1~24.04.2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"runc-app","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.3-0ubuntu1~25.10.3"}]}],"versions":["1.2.5-0ubuntu1","1.3.0-0ubuntu1","1.3.0-0ubuntu2","1.3.3-0ubuntu1~25.10.2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"runc-stable","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.3-0ubuntu1~25.10.3"}]}],"versions":["1.3.0-0ubuntu1","1.3.3-0ubuntu1~25.10.2"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-7851-2","tags":["advisory"]},{"url":"https://launchpad.net/bugs/2130744","tags":["report"]}],"sources":{"osv":[{"id":"USN-7851-2","title":"runc-app, runc-stable regression","description":"USN-7851-1 fixed vulnerabilities in runC. The introduction of a new\nupstream release has caused regressions in runc-app and runc-stable.\nThis update fixes the problem.\n\nOriginal advisory details:\n\n Lei Wang and Li Fubang discovered that runC incorrectly handled masked\n paths. An attacker could possibly replace a container's /dev/null\n with a symlink to some other procfs file and possibly escape a container.\n (CVE-2025-31133)\n\n Lei Wang and Li Fubang discovered that runC incorrectly handled the\n /dev/console bind-mounts. An attacker could potentially exploit this issue\n to build-mount a symlink and escape a container. (CVE-2025-52565)\n\n Li Fubang and Tõnis Tiigi discovered that the fix for CVE-2019-16884 was\n incomplete. An attacker could possibly use this issue to cause a denial of\n service or escape the container. (CVE-2025-52881)","status":"published","published":"2025-11-24T11:21:36Z","modified":"2026-02-10T04:50:20Z","updated_at":"2026-11-02T16:58:21.91885Z"}]}}