🛡️ UBUNTU-CVE-2021-4090
⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2021-12-13
Updated 2026-06-08
Modified 2026-02-04
Fix URL N/A

Affected Packages

Software From version Fixed in
linux-aws-5.0
linux-aws-5.11 5.11.0-1028.31~20.04.1
linux-aws-5.13 5.13.0-1012.13~20.04.1
linux-aws-5.3
linux-aws-5.8
linux-azure
linux-azure-5.11 5.11.0-1028.31~20.04.2
linux-azure-5.13 5.13.0-1013.15~20.04.1
linux-azure-5.3
linux-azure-5.8
linux-azure-edge
linux-gcp
linux-gcp-5.11 5.11.0-1029.33~20.04.3
linux-gcp-5.13 5.13.0-1013.16~20.04.1
linux-gcp-5.3
linux-gcp-5.8
linux-gke-4.15
linux-hwe
linux-hwe-5.11
linux-hwe-5.13 5.13.0-28.31~20.04.1
linux-hwe-5.8
linux-hwe-edge
linux-intel-5.13 5.13.0-1010.10
linux-oem
linux-oem-5.13 5.13.0-1029.36
linux-oem-5.14 5.14.0-1018.19
linux-oem-5.6
linux-oracle-5.0
linux-oracle-5.11 5.11.0-1028.31~20.04.1
linux-oracle-5.13 5.13.0-1016.20~20.04.1
linux-oracle-5.3
linux-oracle-5.8
linux-raspi2
linux-riscv
linux-riscv-5.11
linux-riscv-5.8

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