What’s Vulnerable › Vulnerabilities

CVE-2021-47032: mt76: mt7915: fix tx skb dma unmap

• 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 tx skb dma unmap The first pointer in the txp needs to be unmapped as well, otherwise it will leak DMA mapping entries

Affected products

• Linux kernel: from 5.10 before 5.10.37; from 5.11 before 5.11.21; from 5.12 before 5.12.4 — fixed in 5.10.37, 5.11.21, 5.12.4

How to fix

Upgrade to a fixed version: Linux kernel 5.10.37, 5.11.21, 5.12.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4a9dcd6efb2a268fc5707dcfb3b0c412975c4462
• https://git.kernel.org/stable/c/4e7914ce23306b28d377ec395e00e5fde0e6f96e
• https://git.kernel.org/stable/c/7dcf3c04f0aca746517a77433b33d40868ca4749
• https://git.kernel.org/stable/c/e2cdc9cb33c5963efe1a7c022753386f9463d1b7
• https://git.kernel.org/stable/c/4a9dcd6efb2a268fc5707dcfb3b0c412975c4462
• https://git.kernel.org/stable/c/4e7914ce23306b28d377ec395e00e5fde0e6f96e
• https://git.kernel.org/stable/c/7dcf3c04f0aca746517a77433b33d40868ca4749
• https://git.kernel.org/stable/c/e2cdc9cb33c5963efe1a7c022753386f9463d1b7

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