wifi: mt76: mt7915: fix ext PHY use-after-free on register error path (CVE-2026-90353) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90353

wifi: mt76: mt7915: fix ext PHY use-after-free on register error path

Answer in brief

CVE-2026-90353 records a Unknown severity vulnerability in wifi: mt76: mt7915: fix ext PHY use-after-free on register error 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	>=7b8e1ae886e45aed9274048f2836a70b75ecfa40 <aa55bec92ba7747dd08feff409f8074c5e052e71 \|\| >=7b8e1ae886e45aed9274048f2836a70b75ecfa40 <ad706fcf6255494613b94418e7243d98065dbeaf \|\| >=7b8e1ae886e45aed9274048f2836a70b75ecfa40 <34058ad122f7524e33df8e38caba4b1d803b025a \|\| >=7b8e1ae886e45aed9274048f2836a70b75ecfa40 <a7fd3bae8e11a7c00df6a5021d9ef248ae9f9bf5 \|\| >=7b8e1ae886e45aed9274048f2836a70b75ecfa40 <648f5f03ff50d4bd719106ace0cdf1d8be02cbdd \|\| >=7b8e1ae886e45aed9274048f2836a70b75ecfa40 <15b960014f24dce5388d4a2e7274e6490cb3c421	aa55bec92ba7747dd08feff409f8074c5e052e71, ad706fcf6255494613b94418e7243d98065dbeaf, 34058ad122f7524e33df8e38caba4b1d803b025a, a7fd3bae8e11a7c00df6a5021d9ef248ae9f9bf5, 648f5f03ff50d4bd719106ace0cdf1d8be02cbdd, 15b960014f24dce5388d4a2e7274e6490cb3c421
Linux/Linuxgeneric	5.19	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to aa55bec92ba7747dd08feff409f8074c5e052e71 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 ext PHY use-after-free on register error path After mt7915_register_ext_phy() succeeded, a failure of the main PHY mt7915_init_debugfs() or mt7915_coredump_register() unwound through free_phy2, which called ieee80211_free_hw() on the ext PHY hw while it was still registered with mac80211, since mt76_unregister_device() only unregisters the main hw. Unregister the ext PHY (thermal + phy + hw) first and skip the redundant free.

Quoted source text, attributed separately from HOL analysis.