{"action":"Upgrade linux to 6.12.16-1 or later.","affected":[{"fixed":"6.12.16-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["6.12.16-1"],"id":"tcs_01M5NN1MFXD708Y751PESKXSZQ","modified_at":"2026-10-16T09:47:34.980096679Z","published_at":"2025-02-27T03:15:17.273Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-21766","https://security-tracker.debian.org/tracker/CVE-2025-21766"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-21766#Debian:13/linux","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-21766"}],"summary":"In the Linux kernel, the following vulnerability has been resolved: ipv4: use RCU protection in __ip_rt_update_pmtu() __ip_rt_update_pmtu() must use RCU protection to make sure the net structure it re"}