{"action":"Upgrade util-linux to 2.42.3-1 or later.","affected":[{"fixed":"2.42.3-1","introduced":"0"}],"component":"util-linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["2.42.3-1"],"id":"tcs_01M5NVEZBFBEE5VJSMR0FDBSDN","modified_at":"2026-10-23T17:47:27.969535907Z","published_at":"2026-09-02T16:17:23.833Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-78409","https://security-tracker.debian.org/tracker/CVE-2026-78409"],"severity":{"label":"high","score":7},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-78409#Debian:14/util-linux","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-78409"}],"summary":"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 sy"}