{"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:14","exploited":false,"fixed_versions":["6.12.19-1"],"id":"tcs_01M5NN3ADHCMZNB4AMKJCFYC3E","modified_at":"2026-09-01T20:05:43.000883920Z","published_at":"2025-04-01T16:15:22.790Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-21921","https://security-tracker.debian.org/tracker/CVE-2025-21921"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-21921#Debian:14/linux","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-21921"}],"summary":"In the Linux kernel, the following vulnerability has been resolved: net: ethtool: netlink: Allow NULL nlattrs when getting a phy_device ethnl_req_get_phydev() is used to lookup a phy_device, in the ca"}