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.
Analysis and contextual insights are available on OpenCVE Cloud.
Remediation
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2021-33977 | 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. |
Ubuntu USN |
USN-5217-1 | Linux kernel (OEM) vulnerabilities |
Ubuntu USN |
USN-5265-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-5362-1 | Linux kernel (Intel IOTG) vulnerabilities |
References
History
Tue, 12 May 2026 10:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-05-12T10:12:17.487Z
Reserved: 2021-12-10T00:00:00.000Z
Link: CVE-2021-4090
No data.
Status : Modified
Published: 2022-02-18T18:15:10.207
Modified: 2026-05-12T10:16:37.363
Link: CVE-2021-4090
OpenCVE Enrichment
No data.
Weaknesses
EUVD
Ubuntu USN