Buffer overflow in Linux Linux_kernel
CVE-2021-4090
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 m…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (21.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, Third Party Advisory, Issue Tracking)
- secalert@redhat.com
- secalert@redhat.com (Third Party Advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2021-4090?
- CVE-2021-4090 is a high-severity vulnerability in Linux Linux_kernel, classified under Out-of-bounds Write. CVSS score: 7.1/10. Published 2022-02-18.
- How severe is CVE-2021-4090?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2021-4090 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.