What’s Vulnerable › Vulnerabilities

CVE-2021-47033: mt76: mt7615: 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: mt7615: 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/75bc5f779a7664d1fc19cb915039439c6e58bb94
• https://git.kernel.org/stable/c/821ae236ccea989a1fcc6abfc4d5b74ad4ba39d2
• https://git.kernel.org/stable/c/a025277a80add18c33d01042525a74fe5b875f25
• https://git.kernel.org/stable/c/ebee7885bb12a8fe2c2f9bac87dbd87a05b645f9
• https://git.kernel.org/stable/c/75bc5f779a7664d1fc19cb915039439c6e58bb94
• https://git.kernel.org/stable/c/821ae236ccea989a1fcc6abfc4d5b74ad4ba39d2
• https://git.kernel.org/stable/c/a025277a80add18c33d01042525a74fe5b875f25
• https://git.kernel.org/stable/c/ebee7885bb12a8fe2c2f9bac87dbd87a05b645f9

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