CVE-2026-90371: wifi: mt76: fix RXDMAD_C buffer recycling race

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-17 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: fix RXDMAD_C buffer recycling race The RXDMAD_C buffers come from the RRO data queues' page pools, which are bound to a different NAPI, so the direct page-pool recycle used here could race the owning NAPI; take the non-direct path as is already done for WED RX queues.

Affected products

Linux kernel: 6.18 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/7ac05ed3a50e511c93f8506e555709a208dfce0a
https://git.kernel.org/stable/c/a273dc3b86a7d983d643827d3d3c795d55d8f632
https://git.kernel.org/stable/c/e1f97c10a4ec2b9db69a134b757304399ca903ce

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