wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[] (CVE-2026-90374) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90374

wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]

Answer in brief

CVE-2026-90374 records a Unknown severity vulnerability in wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]. 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	>=98686cd21624c75a043e96812beadddf4f6f48e5 <535091c587268cc783608642838a655d828eefdd \|\| >=98686cd21624c75a043e96812beadddf4f6f48e5 <0f53ece876e1f3bbb3e18f48afc4af1ee967b16c \|\| >=98686cd21624c75a043e96812beadddf4f6f48e5 <b1c5cf8903bec5476a2233b4e45287b9a2213e02 \|\| >=98686cd21624c75a043e96812beadddf4f6f48e5 <2243778a5fae8329ab5f18e7adcd7e03b911a1b7	535091c587268cc783608642838a655d828eefdd, 0f53ece876e1f3bbb3e18f48afc4af1ee967b16c, b1c5cf8903bec5476a2233b4e45287b9a2213e02, 2243778a5fae8329ab5f18e7adcd7e03b911a1b7
Linux/Linuxgeneric	6.2	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 535091c587268cc783608642838a655d828eefdd 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: validate RX band_idx before dereferencing phys[] band_idx comes from a 2-bit descriptor field (0-3) and was used directly to index dev->mt76.phys[] (size __MT_MAX_BAND == 3) and dereference the result. A corrupt or reserved descriptor value could index out of bounds or hit a NULL phy on parts with fewer bands. Reject invalid band indices, mirroring mt7996_rx_get_wcid().

Quoted source text, attributed separately from HOL analysis.