PT-2021-4251 · Linux+4 · Linux Kernel+4

Ben Greear · Published 2021-05-31 · Updated 2023-05-17 · CVE-2021-38206

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 versions prior to 5.12.13

Description The issue is related to the mac80211 subsystem in the Linux kernel, which allows attackers to cause a denial of service by injecting a frame with 802.11a rates when a device supporting only 5 GHz is used. This results in a NULL pointer dereference in the radiotap parser.

Recommendations For Linux kernel versions prior to 5.12.13, update to version 5.12.13 or later to resolve the issue. As a temporary workaround, consider restricting the use of devices that support only 5 GHz to minimize the risk of exploitation.

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2021-2050

ALT-PU-2021-2199

ALT-PU-2021-2315

ALT-PU-2021-2326

ALT-PU-2021-2330

ALT-PU-2021-3481

ALT-PU-2022-1240

ALT-PU-2022-1419

ALT-PU-2022-1421

ALT-PU-2023-1814

AZL-6590

BDU:2021-04859

CVE-2021-38206

OPENSUSE-SU-2021:3179-1

OPENSUSE-SU-2021:3205-1

OPENSUSE-SU-2021_3179-1

OPENSUSE-SU-2021_3205-1

SUSE-SU-2021:3179-1

SUSE-SU-2021:3205-1

SUSE-SU-2021:3205-2

USN-5070-1

Affected Products

Alt Linux

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 186

• https://github.com/torvalds/linux/commit/bddc0c411a45d3718ac535a070f349be8eca8d48 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-38206 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-6590 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:3205-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-38207 · Vendor Advisory
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:3179-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:3179-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3612 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-38206 · Security Note
• https://ubuntu.com/security/CVE-2021-38200 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5070-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-38206 · Security Note
• https://ubuntu.com/security/notices/USN-5070-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-38206 · Vendor Advisory