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CVE-2021-47032

mt76: mt7915: fix tx skb dma unmap

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

Affected

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

Linux Kernel· Linux
95%
5.10 ≤ v < 5.10.375.10 ≤ v < 5.11.215.10 ≤ v < 5.12.45.10 ≤ v < 5.135.11 ≤ v < 5.11.215.12 ≤ v < 5.12.427d5c528a7ca08dcd44877fdd9fc08b76630bf775.10
Vendor states this is fixed in 4a9dcd6efb2a268fc5707dcfb3b0c412975c4462 (fixed)
Vendor states this is fixed in 4e7914ce23306b28d377ec395e00e5fde0e6f96e (fixed)
Vendor states this is fixed in 7dcf3c04f0aca746517a77433b33d40868ca4749 (fixed)
Vendor states this is fixed in e2cdc9cb33c5963efe1a7c022753386f9463d1b7 (fixed)
Vendor states this is fixed in 5.10 (unaffected)
Vendor states this is fixed in 5.10.37 (unaffected)
Vendor states this is fixed in 5.11.21 (unaffected)
Vendor states this is fixed in 5.12.4 (unaffected)
Vendor states this is fixed in 5.13 (unaffected)

References (4)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4a9dcd6efb2a268fc5707dcfb3b0c412975c4462
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4e7914ce23306b28d377ec395e00e5fde0e6f96e
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/7dcf3c04f0aca746517a77433b33d40868ca4749
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e2cdc9cb33c5963efe1a7c022753386f9463d1b7

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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