{"action":"Upgrade linux to 6.12.17-1 or later.","affected":[{"fixed":"6.12.17-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["6.12.17-1"],"id":"tcs_01M5NN2FTKTYGFQWRT50E0D6Z4","modified_at":"2026-09-01T20:05:42.747818742Z","published_at":"2025-03-12T10:15:18.583Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-21857","https://security-tracker.debian.org/tracker/CVE-2025-21857"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-21857","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-21857"}],"summary":"In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_api: fix error handling causing NULL dereference tcf_exts_miss_cookie_base_alloc() calls xa_alloc_cyclic() which can"}