{"action":"Upgrade linux to 5.15.3-1 or later.","affected":[{"fixed":"5.15.3-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["5.15.3-1"],"id":"tcs_01M5NFTFG77FBPX51CM4WNNRTR","modified_at":"2026-10-23T18:04:50.777760909Z","published_at":"2022-03-03T23:15:08.197Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-3640","https://security-tracker.debian.org/tracker/CVE-2021-3640"],"severity":{"label":"high","score":7},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-3640#Debian:13/linux","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-3640"}],"summary":"A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_de"}