wifi: mt76: reject out-of-range link ids in mt76_vif_link() (CVE-2026-90350) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90350

wifi: mt76: reject out-of-range link ids in mt76_vif_link()

Answer in brief

CVE-2026-90350 records a Unknown severity vulnerability in wifi: mt76: reject out-of-range link ids in mt76_vif_link(). 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	>=a9384b36a42afc2d715eb74c19a7ee558f09ef82 <13f6a9c786022d5213e84d494cc8717c378f5395 \|\| >=a9384b36a42afc2d715eb74c19a7ee558f09ef82 <c1442c345ca8da857fadea1d0797b97347ab6984 \|\| >=a9384b36a42afc2d715eb74c19a7ee558f09ef82 <9ba744a28c26eaa5cae930688a22e01888395308	13f6a9c786022d5213e84d494cc8717c378f5395, c1442c345ca8da857fadea1d0797b97347ab6984, 9ba744a28c26eaa5cae930688a22e01888395308
Linux/Linuxgeneric	6.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 13f6a9c786022d5213e84d494cc8717c378f5395 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: reject out-of-range link ids in mt76_vif_link() mt76_vif_link() indexes mvif->link[] without validating link_id, but callers pass mvif->deflink_id / msta->deflink_id, which hold IEEE80211_LINK_UNSPECIFIED (0xf) until the first link has been added. Since IEEE80211_MLD_MAX_NUM_LINKS is 15, that reads one element past the end of the array, aliasing mt76_vif_data.offchannel_link. Reachable via mt7996_set_tsf()/mt7996_offset_tsf() and mt7996_net_fill_forward_path(). Bounds check link_id and return NULL, matching mt7996_sta_link() and mt7996_sta_link_protected().

Quoted source text, attributed separately from HOL analysis.