{"action":"Upgrade linux to 6.1.159-1 or later.","affected":[{"fixed":"6.1.159-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["6.1.159-1"],"id":"tcs_01M5NNTEZCVW7G6C3Y67ERVDFH","modified_at":"2026-10-23T18:04:36.494255950Z","published_at":"2025-12-04T16:16:19.503Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-40257","https://security-tracker.debian.org/tracker/CVE-2025-40257"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-40257","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-40257"}],"summary":"In the Linux kernel, the following vulnerability has been resolved: mptcp: fix a race in mptcp_pm_del_add_timer() mptcp_pm_del_add_timer() can call sk_stop_timer_sync(sk, &entry->add_timer) while anot"}