wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx() (CVE-2026-90381) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90381

wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()

Answer in brief

CVE-2026-90381 records a Unknown severity vulnerability in wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=82334623af0cd2154633cdb007719a321048fafc <063169a2755abdcbe7698d98360336abb6bef414 \|\| >=82334623af0cd2154633cdb007719a321048fafc <70869cc429fffc77de51e7777c0ecb651e8fca07	063169a2755abdcbe7698d98360336abb6bef414, 70869cc429fffc77de51e7777c0ecb651e8fca07
Linux/Linuxgeneric	6.14	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 063169a2755abdcbe7698d98360336abb6bef414 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.