{"action":"Upgrade linux to 6.12.20-1 or later.","affected":[{"fixed":"6.12.20-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["6.12.20-1"],"id":"tcs_01M5NN421WRRGARTES0R99F30W","modified_at":"2026-09-01T20:05:43.359009163Z","published_at":"2025-04-02T13:15:43.670Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-21991","https://security-tracker.debian.org/tracker/CVE-2025-21991"],"severity":{"label":"high","score":7.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-21991#Debian:13/linux","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-21991"}],"summary":"In the Linux kernel, the following vulnerability has been resolved: x86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes Currently, load_microcode_amd() iterates over all NUMA node"}