What’s Vulnerable › Vulnerabilities

CVE-2026-90353: wifi: mt76: mt7915: fix ext PHY use-after-free on register error path

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

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.

Affected products

• Linux kernel: 5.19 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/15b960014f24dce5388d4a2e7274e6490cb3c421
• https://git.kernel.org/stable/c/34058ad122f7524e33df8e38caba4b1d803b025a
• https://git.kernel.org/stable/c/648f5f03ff50d4bd719106ace0cdf1d8be02cbdd
• https://git.kernel.org/stable/c/a7fd3bae8e11a7c00df6a5021d9ef248ae9f9bf5
• https://git.kernel.org/stable/c/aa55bec92ba7747dd08feff409f8074c5e052e71
• https://git.kernel.org/stable/c/ad706fcf6255494613b94418e7243d98065dbeaf

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