{"action":"Upgrade linux to 5.15.5-1 or later.","affected":[{"fixed":"5.15.5-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["5.15.5-1"],"id":"tcs_01M5NFZM47ATP3D1YJWHB1NJR5","modified_at":"2026-10-15T09:47:41.552751577Z","published_at":"2022-02-18T18:15:10.207Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-4090","https://security-tracker.debian.org/tracker/CVE-2021-4090"],"severity":{"label":"high","score":7.1},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-4090#Debian:14/linux","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-4090"}],"summary":"An out-of-bounds (OOB) memory write flaw was found in the NFSD in the Linux kernel. Missing sanity may lead to a write beyond bmval[bmlen-1] in nfsd4_decode_bitmap4 in fs/nfsd/nfs4xdr.c. In this flaw,"}