wifi: mt76: mt7996: free vif links after clearing wcid entries on full reset (CVE-2026-90356) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90356

wifi: mt76: mt7996: free vif links after clearing wcid entries on full reset

Answer in brief

CVE-2026-90356 records a Unknown severity vulnerability in wifi: mt76: mt7996: free vif links after clearing wcid entries on full reset. 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	>=ace5d3b6b49e8391beb4d7244348ba7da5298878 <2b10eb3636d0c4cb6b763e045ec1294dbd70f5ad \|\| >=ace5d3b6b49e8391beb4d7244348ba7da5298878 <8826d7a5e2dd727aa96456ccd58b33d2b080e935 \|\| >=ace5d3b6b49e8391beb4d7244348ba7da5298878 <7e4208e9f6a876c2b7d28fdb6b86dff3b05db2f7	2b10eb3636d0c4cb6b763e045ec1294dbd70f5ad, 8826d7a5e2dd727aa96456ccd58b33d2b080e935, 7e4208e9f6a876c2b7d28fdb6b86dff3b05db2f7
Linux/Linuxgeneric	6.18	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 2b10eb3636d0c4cb6b763e045ec1294dbd70f5ad 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: mt7996: free vif links after clearing wcid entries on full reset mt7996_mac_reset_vif_iter() queues non-default vif links for kfree_rcu while dev->wcid[] still holds pointers to the wcid embedded in each freed link; mt76_reset_device() then dereferences those entries and runs mt76_wcid_cleanup() on them. If a grace period elapses in between, the cleanup operates on freed memory. Run mt76_reset_device() first, so the wcid entries are cleaned up and cleared while the links are still valid.

Quoted source text, attributed separately from HOL analysis.