Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L L L N U H H N 7.1 .0034 25.0 —
AFFECTED Product Versions Fixed kernel 5.11 – —
TIMELINE Dec 10 Reserved by redhat Feb 18 Published (CNA: redhat) Aug 25 ENRICHED — CVE-2021-4090 (Linux kernel). Received CVSS 7.1 and CPE data from NVD.
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.
| Date | Event | Detail |
|---|---|---|
| December 10, 2021 | Reserved | Reserved by redhat |
| February 18, 2022 | Published | Published (CNA: redhat) |
| August 25, 2026 | ENRICHED | ENRICHED — CVE-2021-4090 (Linux kernel). Received CVSS 7.1 and CPE data from NVD. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| Linux | kernel | — | 5.11 | — |
Authoritative record: CVE-2021-4090 at cve.org
Vendors: linux
Weaknesses: CWE-787
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-4090 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
