{"action":"Upgrade linux to 5.9.15-1 or later.","affected":[{"fixed":"5.9.15-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["5.9.15-1"],"id":"tcs_01M5NEZ1XSTT1VBJ3TQGNKFCB1","modified_at":"2026-10-26T12:02:12.984178268Z","published_at":"2021-01-07T18:15:13.137Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-27835","https://security-tracker.debian.org/tracker/CVE-2020-27835"],"severity":{"label":"medium","score":4.4},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-27835","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-27835"}],"summary":"A use after free in the Linux kernel infiniband hfi1 driver in versions prior to 5.10-rc6 was found in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash"}