{"action":"Upgrade linux to 5.14.12-1 or later.","affected":[{"fixed":"5.14.12-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["5.14.12-1"],"id":"tcs_01M5NFBPV59KYEZS9WN3SPK0SH","modified_at":"2026-10-23T18:03:24.678586858Z","published_at":"2022-02-18T18:15:08.947Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-20321","https://security-tracker.debian.org/tracker/CVE-2021-20321"],"severity":{"label":"medium","score":4.7},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-20321#Debian:13/linux","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-20321"}],"summary":"A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system"}