{"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_01M5NN41PE564Z56J6A86J5PMB","modified_at":"2026-09-01T20:05:43.260754300Z","published_at":"2025-04-02T13:15:43.547Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-21990","https://security-tracker.debian.org/tracker/CVE-2025-21990"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-21990","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-21990"}],"summary":"In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: NULL-check BO's backing store when determining GFX12 PTE flags PRT BOs may not have any backing store, so bo->tbo.resour"}