{"action":"Upgrade linux to 6.12.19-1 or later.","affected":[{"fixed":"6.12.19-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["6.12.19-1"],"id":"tcs_01M5NN2S5CYMNAMC69XE1VB90P","modified_at":"2026-10-15T09:47:39.656232068Z","published_at":"2025-03-27T15:15:56.603Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-21887","https://security-tracker.debian.org/tracker/CVE-2025-21887"],"severity":{"label":"high","score":7.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-21887#Debian:13/linux","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-21887"}],"summary":"In the Linux kernel, the following vulnerability has been resolved: ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up The issue was caused by dput(upper) being called before ovl_"}