{"id":"CVE-2021-4090","revision":"ae400bb7231b45598989a37c0cd9d9b9","records":[{"revision":"ae400bb7231b45598989a37c0cd9d9b9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2021-4090","aliases":[],"title":"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, a local attacker with user privilege ma…","description":"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, a local attacker with user privilege may gain access to out-of-bounds memory, leading to a system integrity and confidentiality threat.","state":0,"publishedAt":"2022-02-18T00:00:00+00:00","modifiedAt":"2026-10-14T10:04:03.126+00:00","affected":[{"ecosystem":"https://git.kernel.org/pub/scm/linux/kernel","name":"kernel","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Linux\",\n                    \"product\": \"kernel\",\n                    \"packageName\": \"kernel\",\n                    \"collectionURL\": \"https://git.kernel.org/pub/scm/linux/kernel\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"5.11\",\n                            \"lessThan\": \"5.15.5\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=2025101","https://lore.kernel.org/linux-nfs/163692036074.16710.5678362976688977923.stgit%40klimt.1015granger.net/","https://security.netapp.com/advisory/ntap-20220318-0010/","https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c0019b7db1d7ac62c711cda6b357a659d46428fe"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2021-4090","license":"CVE Program Terms of Use","key":"cve-program:CVE-2021-4090","identifiers":["CVE-2021-4090"]},"retained":false,"historicalAffected":[]}],"coverage":[]}