wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx() (CVE-2026-90349) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90349

wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()

Answer in brief

CVE-2026-90349 records a Unknown severity vulnerability in wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx(). 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	>=1609b014aa29f9a2bf3aaa93f71de4a06725845e <637bb99cc766a858d744905e46638459ca128b6c \|\| >=1609b014aa29f9a2bf3aaa93f71de4a06725845e <aff81505a84d27f83b4db8e039e813930cb23c2c \|\| >=1609b014aa29f9a2bf3aaa93f71de4a06725845e <4330a0ef9f75a54fde3548432a9a698f06bab635	637bb99cc766a858d744905e46638459ca128b6c, aff81505a84d27f83b4db8e039e813930cb23c2c, 4330a0ef9f75a54fde3548432a9a698f06bab635
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 637bb99cc766a858d744905e46638459ca128b6c 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: fix out-of-bounds link array access in mt7996_tx() When mac80211 leaves the link unspecified, mt7996_tx() substitutes the primary link id of the station or vif. That value is IEEE80211_LINK_UNSPECIFIED (0xf) until the first link has been added, and it is then used unchecked to index vif->link_conf[], mvif->mt76.link[] and sta->link[], all of which hold IEEE80211_MLD_MAX_NUM_LINKS (15) entries. Clamp the primary link id to the default link before using it, and use the clamped value for the link_sta fallback as well.

Quoted source text, attributed separately from HOL analysis.