wifi: mt76: mt7915: fix double hif2 init on the non-WED path (CVE-2026-90354) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90354

wifi: mt76: mt7915: fix double hif2 init on the non-WED path

Answer in brief

CVE-2026-90354 records a Unknown severity vulnerability in wifi: mt76: mt7915: fix double hif2 init on the non-WED path. 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	>=cacdd67812c6df824704ac078f1770188a485ff9 <eac18fadc791928379b179e54636494b92f8cf86 \|\| >=cacdd67812c6df824704ac078f1770188a485ff9 <927fe8c0eb8c10295bc0018c8faa4d91f8fe98c6 \|\| >=cacdd67812c6df824704ac078f1770188a485ff9 <bd2e8f535ae35beb45a7fcc17ec9bbf8dc4db5fe \|\| >=cacdd67812c6df824704ac078f1770188a485ff9 <249cbaa1873550689fab136b74982cbba74c4169 \|\| >=cacdd67812c6df824704ac078f1770188a485ff9 <29fbc5256c2d8448f084ff179d2e5092ecd1fc54 \|\| >=cacdd67812c6df824704ac078f1770188a485ff9 <3ae8ad277e2819a281b0e36b55633c8515c16ce7	eac18fadc791928379b179e54636494b92f8cf86, 927fe8c0eb8c10295bc0018c8faa4d91f8fe98c6, bd2e8f535ae35beb45a7fcc17ec9bbf8dc4db5fe, 249cbaa1873550689fab136b74982cbba74c4169, 29fbc5256c2d8448f084ff179d2e5092ecd1fc54, 3ae8ad277e2819a281b0e36b55633c8515c16ce7
Linux/Linuxgeneric	5.18	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to eac18fadc791928379b179e54636494b92f8cf86 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: mt7915: fix double hif2 init on the non-WED path mt7915_pci_init_hif2() was called unconditionally and again inside the WED-inactive branch. The helper increments the global hif_idx, writes the PCIe RECOG_ID register and takes a get_device() reference via mt7915_pci_get_hif2(), while removal only drops one reference. On non-WED dual-hif hardware this double-incremented hif_idx, wrote RECOG_ID twice and leaked a device reference. Only the call inside the WED-inactive branch is correct; drop the unconditional one. hif2 is already initialised to NULL.

Quoted source text, attributed separately from HOL analysis.