PT-2021-7264 · Linux+8 · Linux Kernel+8

Published 2021-04-14 · Updated 2023-01-17 · CVE-2021-4157

Positive Technologies (AI Summary)

CVSS v3.1

8.0

High

Base vector

AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw in the Linux kernel NFS subsystem allows for an out of memory bounds write, potentially enabling a user with access to the NFS mount to crash the system or escalate privileges. This issue is related to the way users utilize mirroring, or replication of files with NFS.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

ALSA-2022:1988

ALT-PU-2021-1873

ALT-PU-2021-1874

ALT-PU-2021-1888

ALT-PU-2021-1893

ALT-PU-2021-1896

ALT-PU-2021-1912

ALT-PU-2021-1920

ALT-PU-2021-1961

ALT-PU-2021-1985

ALT-PU-2021-1990

ALT-PU-2021-2293

ALT-PU-2021-2305

ALT-PU-2021-2307

ALT-PU-2021-2671

ALT-PU-2021-3481

BDU:2022-04604

CESA-2022_1975

CESA-2022_1988

CVE-2021-4157

OESA-2022-1940

OPENSUSE-SU-2022:2549-1

OPENSUSE-SU-2022_2376-1

OPENSUSE-SU-2022_2411-1

OPENSUSE-SU-2022_2422-1

OPENSUSE-SU-2022_2549-1

RHSA-2022:1975

RHSA-2022:1988

RHSA-2022_1975

RHSA-2022_1988

RLSA-2022:1975

RLSA-2022:1988

SUSE-SU-2022:2376-1

SUSE-SU-2022:2377-1

SUSE-SU-2022:2379-1

SUSE-SU-2022:2382-1

SUSE-SU-2022:2393-1

SUSE-SU-2022:2407-1

SUSE-SU-2022:2411-1

SUSE-SU-2022:2424-1

SUSE-SU-2022:2424-2

SUSE-SU-2022:2478-1

SUSE-SU-2022:2549-1

SUSE-SU-2022:2629-1

SUSE-SU-2022:2809-1

USN-5413-1

Affected Products

Alt Linux

Almalinux

Astra Linux

Centos

Linux Kernel

Red Hat

Rocky Linux

Suse

Ubuntu

References · 346

• 🔥 https://lore.kernel.org/lkml/[e-mail] · Exploit
• https://ubuntu.com/security/CVE-2021-4157 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:2393-1 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2022:1988 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:2411-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:2478-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:2407-1 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2022:1975 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:2382-1 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2022:1988 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5413-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-4157 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-26490 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2022:2549-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-3656 · Security Note