What’s Vulnerable › Vulnerabilities

CVE-2021-47021: mt76: mt7915: fix memleak when mt7915_unregister_device()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-28 · updated 2026-06-17
• Weakness: CWE-401

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 products

• Linux kernel: from 5.11.4 before 5.11.21; from 5.12 before 5.12.4 — fixed in 5.11.21, 5.12.4

How to fix

Upgrade to a fixed version: Linux kernel 5.11.21, 5.12.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/81483309ce861a9fa7835322787f68a443fea364
• https://git.kernel.org/stable/c/d754c80ae82a662e692a82faad71b8c218cb7f52
• https://git.kernel.org/stable/c/e9d32af478cfc3744a45245c0b126738af4b3ac4
• https://git.kernel.org/stable/c/81483309ce861a9fa7835322787f68a443fea364
• https://git.kernel.org/stable/c/d754c80ae82a662e692a82faad71b8c218cb7f52
• https://git.kernel.org/stable/c/e9d32af478cfc3744a45245c0b126738af4b3ac4

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