https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Mon, 28 Sep 2026 13:09:01 +0000 https://vulnerability.circl.lu/vuln/bell-cve-2026-78409 <p><strong>Affected:</strong> Alpaquita:stream: util-linux, BellSoft Hardened Containers:stream: util-linux</p> <p><strong>Affected:</strong> Alpaquita:stream: util-linux, BellSoft Hardened Containers:stream: util-linux</p> https://vulnerability.circl.lu/vuln/bell-cve-2026-78409 https://vulnerability.circl.lu/vuln/fkie_cve-2026-78409 <p>The X-mount.subdir option uses a detached-tree fast path on Linux 6.15 and later and passes the configured subdirectory to open_tree() with AT_SYMLINK_NOFOLLOW. That flag does not stop intermediate symlink traversal or keep resolution inside the newly mounted filesystem. A local unprivileged user with an fstab-authorized X-mount.subdir entry can attach a host path at the intended mountpoint.</p> <p>The X-mount.subdir option uses a detached-tree fast path on Linux 6.15 and later and passes the configured subdirectory to open_tree() with AT_SYMLINK_NOFOLLOW. That flag does not stop intermediate symlink traversal or keep resolution inside the newly mounted filesystem. A local unprivileged user with an fstab-authorized X-mount.subdir entry can attach a host path at the intended mountpoint.</p> https://vulnerability.circl.lu/vuln/fkie_cve-2026-78409 https://vulnerability.circl.lu/vuln/opensuse-su-2026:11870-1 <p>libblkid-devel-2.42.3-1.1 on GA media</p> <p>libblkid-devel-2.42.3-1.1 on GA media</p> https://vulnerability.circl.lu/vuln/opensuse-su-2026:11870-1 https://vulnerability.circl.lu/vuln/rhsa-2026:63162 <p>util-linux: util-linux: failed external mount helper still runs privileged X-mount post-hooks util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority util-linux: util-linux: X-mount.subdir detached-tree resolution can escape via intermediate symlinks util-linux: util-linux: restricted bind mounts do not pin the source, allowing X-mount.owner/group/mode redirection</p> <p>util-linux: util-linux: failed external mount helper still runs privileged X-mount post-hooks util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority util-linux: util-linux: X-mount.subdir detached-tree resolution can escape via intermediate symlinks util-linux: util-linux: restricted bind mounts do not pin the source, allowing X-mount.owner/group/mode redirection</p> https://vulnerability.circl.lu/vuln/rhsa-2026:63162 https://vulnerability.circl.lu/vuln/ubuntu-cve-2026-78409 <p><strong>Affected:</strong> Ubuntu:14.04:LTS: util-linux, Ubuntu:Pro:16.04:LTS: util-linux, Ubuntu:18.04:LTS: util-linux, Ubuntu:Pro:20.04:LTS: util-linux, Ubuntu:22.04:LTS: util-linux, Ubuntu:24.04:LTS: util-linux, Ubuntu:26.04:LTS: util-linux</p> <p>The X-mount.subdir option uses a detached-tree fast path on Linux 6.15 and later and passes the configured subdirectory to open_tree() with AT_SYMLINK_NOFOLLOW. That flag does not stop intermediate symlink traversal or keep resolution inside the newly mounted filesystem. A local unprivileged user with an fstab-authorized X-mount.subdir entry can attach a host path at the intended mountpoint.</p> <p><strong>Affected:</strong> Ubuntu:14.04:LTS: util-linux, Ubuntu:Pro:16.04:LTS: util-linux, Ubuntu:18.04:LTS: util-linux, Ubuntu:Pro:20.04:LTS: util-linux, Ubuntu:22.04:LTS: util-linux, Ubuntu:24.04:LTS: util-linux, Ubuntu:26.04:LTS: util-linux</p> <p>The X-mount.subdir option uses a detached-tree fast path on Linux 6.15 and later and passes the configured subdirectory to open_tree() with AT_SYMLINK_NOFOLLOW. That flag does not stop intermediate symlink traversal or keep resolution inside the newly mounted filesystem. A local unprivileged user with an fstab-authorized X-mount.subdir entry can attach a host path at the intended mountpoint.</p> https://vulnerability.circl.lu/vuln/ubuntu-cve-2026-78409