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.
Published: 2022-02-18
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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

Sign in to view the affected projects.

Advisories
Source ID Title
EUVD 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 Ubuntu USN USN-5217-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5265-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5362-1 Linux kernel (Intel IOTG) vulnerabilities
History

Tue, 12 May 2026 10:30:00 +0000

Type Values Removed Values Added
References

Subscriptions

Linux Linux Kernel
Netapp H300e H300e Firmware H300s H300s Firmware H410c H410c Firmware H410s H410s Firmware H500e H500e Firmware H500s H500s Firmware H700e H700e Firmware H700s H700s Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-05-12T10:12:17.487Z

Reserved: 2021-12-10T00:00:00.000Z

Link: CVE-2021-4090

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-02-18T18:15:10.207

Modified: 2026-05-12T10:16:37.363

Link: CVE-2021-4090

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-11-13T00:00:00Z

Links: CVE-2021-4090 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses