PT-2024-11122 · Linux · Linux Kernel

Published 2021-04-21 · Updated 2024-12-09 · CVE-2021-47021

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 memory leak issue has been resolved in the Linux kernel. The issue occurred when mt7915 unregister device() was called, and mt7915 tx token put() should have been called before mt76 free pending txwi().

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

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

BDU:2025-06546

CVE-2021-47021

Affected Products

Linux Kernel

References · 17

• https://git.kernel.org/stable/c/d754c80ae82a662e692a82faad71b8c218cb7f52 · Patch
• https://git.kernel.org/stable/c/e9d32af478cfc3744a45245c0b126738af4b3ac4 · Patch
• https://cve.org/CVERecord?id=CVE-2021-47021 · Security Note
• https://git.kernel.org/stable/c/81483309ce861a9fa7835322787f68a443fea364 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-47021 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47021 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47021 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-06546 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47021 · Vendor Advisory
• https://t.me/cvenotify/103583 · Telegram Post
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47021 · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21 · Note
• https://lore.kernel.org/linux-cve-announce/2024022833-CVE-2021-47021-6cbb@gregkh · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4 · Note
• https://git.kernel.org/linus/e9d32af478cfc3744a45245c0b126738af4b3ac4 · Note