CVE Catalog

CVE-2021-4090

HighCVSS 7.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.34%

26th percentile - higher than 26% of all known CVEs

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.

Risk Assessment

A local attacker with user privilege may gain access to out-of-bounds memory, leading to a system integrity and confidentiality threat.

Recommendation

It is recommended to update the Linux kernel to the latest version to mitigate this vulnerability and to monitor the system for potential attack attempts.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS