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CVE-2021-47021

mt76: mt7915: fix memleak when mt7915_unregister_device()

MEDIUM
5.5
CVSS Score
Published: February 28, 2024 at 08:13 AM UTC
Updated: June 17, 2026 at 04:16 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7915: fix memleak when mt7915_unregister_device() mt7915_tx_token_put() should get call before mt76_free_pending_txwi().

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
5.11.4 ≤ v < 5.11.215.12 ≤ v < 5.12.45.12 ≤ v < 5.134e9e896f81932e337a93ad61cd3d9647571c46375.11.45.12f285dfb98562e8380101095d168910df1d07d8be
Vendor states this is fixed in 81483309ce861a9fa7835322787f68a443fea364 (fixed)
Vendor states this is fixed in d754c80ae82a662e692a82faad71b8c218cb7f52 (fixed)
Vendor states this is fixed in e9d32af478cfc3744a45245c0b126738af4b3ac4 (fixed)
Vendor states this is fixed in 5.11.21 (unaffected)
Vendor states this is fixed in 5.12 (unaffected)
Vendor states this is fixed in 5.12.4 (unaffected)
Vendor states this is fixed in 5.13 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/81483309ce861a9fa7835322787f68a443fea364
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d754c80ae82a662e692a82faad71b8c218cb7f52
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e9d32af478cfc3744a45245c0b126738af4b3ac4

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-401

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