PT-2016-3340 · Linux+3 · Linux Kernel+3

Published 2016-01-24 · Updated 2022-08-05 · CVE-2021-20265

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description A flaw was found in the way memory resources were freed in the unix stream recvmsg function in the Linux kernel when a signal was pending. This flaw allows an unprivileged local user to crash the system by exhausting available memory. The highest threat from this issue is to system availability.

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

Fix

Memory Leak

Resource Exhaustion

Weakness Enumeration

CWE-401

CWE-400

Related Identifiers

BDU:2021-01684

CESA-2021_0856

CVE-2021-20265

RHSA-2021:0856

RHSA-2021:0857

RHSA-2021:1288

RHSA-2021_0856

RHSA-2021_0857

RHSA-2021_1288

SUSE-SU-2021:14849-1

SUSE-SU-2021:3929-1

SUSE-SU-2021:3935-1

SUSE-SU-2021_14849-1

Affected Products

Centos

Linux Kernel

Red Hat

Suse

References · 133

• https://oracle.com/security-alerts/cpuoct2021.html · Patch
• https://osv.dev/vulnerability/SUSE-SU-2021:3935-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-20265 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-20265 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2021:3929-1 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1908827 · Patch
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fa0dc04df259ba2df3ce1920e9690c7842f8fa4b · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:14849-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-20265 · Security Note
• https://bdu.fstec.ru/vul/2021-01684 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-20265 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-20265 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-20265 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-20265 · Vendor Advisory
• https://suse.com/security/cve/CVE-2021-31916 · Note