PT-2021-8126 · Linux+3 · Linux Kernel+3

Published 2021-12-20 · Updated 2025-02-03 · CVE-2021-47091

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 The issue is related to incorrect locking of resources in the mac80211 component of the Linux kernel. This could allow an attacker to cause a denial of service. The problem is specifically with the ieee80211 start ap error path, where the local->mtx needs to be held to release the channel context, as indicated by lockdep assert held().

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

Improper Locking

Weakness Enumeration

CWE-667

CWE-413

Related Identifiers

BDU:2024-08383

CVE-2021-47091

OPENSUSE-SU-2024_1321-1

OPENSUSE-SU-2024_1322-1

OPENSUSE-SU-2024_1322-2

OPENSUSE-SU-2024_1332-1

OPENSUSE-SU-2024_1332-2

OPENSUSE-SU-2024_1466-1

OPENSUSE-SU-2024_1480-1

OPENSUSE-SU-2024_1490-1

SUSE-SU-2024:1320-1

SUSE-SU-2024:1321-1

SUSE-SU-2024:1466-1

SUSE-SU-2024:1480-1

SUSE-SU-2024:1490-1

Affected Products

Astra Linux

Linux Kernel

Red Os

Suse

References · 466

• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47091 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1320-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1466-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-47091 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47091 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1480-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47091 · Vendor Advisory
• https://git.kernel.org/stable/c/87a270625a89fc841f1a7e21aae6176543d8385c · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-47091 · Security Note
• https://git.kernel.org/stable/c/ac61b9c6c0549aaeb98194cf429d93c41bfe5f79 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:1490-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1321-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-08383 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47091 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47091 · Security Note