CVE-2021-4157 — Improper Restriction of Operations within the Bounds of a Memory Buffer in Kernel
Severity
8.0HIGHNVD
OSV4.7
EPSS
0.1%
top 82.88%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMar 25
Latest updateMay 12
Description
An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could potentially use this flaw to crash the system or escalate privileges on the system.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 2.1 | Impact: 5.9
Affected Packages9 packages
Also affects: Fedora 35
🔴Vulnerability Details
3GHSA▶
GHSA-5w94-r98f-mc64: An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of↗2022-03-26
OSV▶
CVE-2021-4157: An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of↗2022-03-25
📋Vendor Advisories
4Microsoft▶
An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS). A user having access to the NFS ↗2022-03-08
Debian▶
CVE-2021-4157: linux - An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel ...↗2021