Bug 2536336 (CVE-2026-90353) - CVE-2026-90353 kernel: wifi: mt76: mt7915: fix ext PHY use-after-free on register error path
Summary: CVE-2026-90353 kernel: wifi: mt76: mt7915: fix ext PHY use-after-free on regi...
Keywords:
Status: NEW
Alias: CVE-2026-90353
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 17:26 UTC by OSIDB Bzimport
Modified: 2026-10-20 10:53 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-09-17 17:26:27 UTC
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.


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