PT-2024-11258 · Linux+1 · Linux Kernel+1

Published 2021-05-31 · Updated 2024-05-21 · CVE-2021-47251

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/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 The issue concerns a fix for the skb length check in the ieee80211 scan rx() function within the mac80211 module. It replaces hard-coded compile-time constants for header length checks with dynamic determination based on the frame type to prevent hitting a validation WARN ON in cfg80211 later.

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

Weakness Enumeration

CWE-1284

Related Identifiers

BDU:2025-13722

CVE-2021-47251

Affected Products

Astra Linux

Linux Kernel

References · 17

• https://nvd.nist.gov/vuln/detail/CVE-2021-47251 · Security Note
• https://git.kernel.org/stable/c/5a1cd67a801cf5ef989c4783e07b86a25b143126 · Patch
• https://git.kernel.org/stable/c/d1b949c70206178b12027f66edc088d40375b5cb · Patch
• https://osv.dev/vulnerability/CVE-2021-47251 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47251 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47251 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-47251 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-13722 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47251 · Vendor Advisory
• https://git.kernel.org/stable/c/e298aa358f0ca658406d524b6639fe389cb6e11e · Patch
• https://ubuntu.com/security/CVE-2021-47251 · Vendor Advisory
• https://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1&id=5a1cd67a801cf5ef989c4783e07b86a25b143126 · Note
• https://twitter.com/CVEnew/status/1792928058921361830 · Twitter Post
• https://git.kernel.org/linus/e298aa358f0ca658406d524b6639fe389cb6e11e · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.46 · Note