CVE-2021-4090
An out-of-bounds (OOB) memory write flaw was found in the NFSD in the Linux kernel.
Published Feb 18, 2022 · updated Oct 14, 2026 · linux linux kernel
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.
Timeline
Detection, updates, and resolution for this record.
Feb 18, 2022 · NIST NVD
Detected
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.
Oct 14, 2026 · NIST NVD
Updated
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.
Affected
- cpe linux/linux kernelversion unspecified
- cpe linux/linux kernel5.16
- cpe netapp/h300e firmwareversion unspecified
- cpe netapp/h300s firmwareversion unspecified
- cpe netapp/h410c firmwareversion unspecified
- cpe netapp/h410s firmwareversion unspecified
- cpe netapp/h500e firmwareversion unspecified
- cpe netapp/h500s firmwareversion unspecified
- cpe netapp/h700e firmwareversion unspecified
- cpe netapp/h700s firmwareversion unspecified
Sources
- CVE.orgCVE-2021-4090
Official CVE identifier
cve.org - NIST NVDCVE-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 may gain access to out-of-bounds memory, l
nvd.nist.gov