{"action":"Upgrade linux to 6.12.21-1 or later.","affected":[{"fixed":"6.12.21-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["6.12.21-1"],"id":"tcs_01M5NN437MRZRVG6SWBKE3QPZ2","modified_at":"2026-09-01T20:05:43.337077597Z","published_at":"2025-04-02T14:16:01.440Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-21994","https://security-tracker.debian.org/tracker/CVE-2025-21994"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-21994#Debian:14/linux","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-21994"}],"summary":"In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix incorrect validation for num_aces field of smb_acl parse_dcal() validate num_aces to allocate posix_ace_state_array. if ("}