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CVE-2026-90352: wifi: mt76: mt7915: release hif2 reference on probe IRQ failure

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% 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: release hif2 reference on probe IRQ failure The hif2 reference obtained by mt7915_pci_init_hif2() is only released on error paths that key off dev->hif2, which is not assigned until after the IRQ setup. If pci_alloc_irq_vectors() or the primary devm_request_irq() fails, the reference leaks. Drop it explicitly on those paths via mt7915_put_hif2().

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/2a434d2637b9c9be9bcc8a84dc46880cc1446643
• https://git.kernel.org/stable/c/5c30a6350a300fbb800831f1b4373b2f59e03410
• https://git.kernel.org/stable/c/8370aebd26a9dfa2e0de665e3ab504c0e97ee730
• https://git.kernel.org/stable/c/8a2e38019846da29a112fac4dd96fe5bfa298faf
• https://git.kernel.org/stable/c/ed5cc46a3c8f4fe7f549c661914d8d835169acc0
• https://git.kernel.org/stable/c/fb9c7b4c238b4e5469a11a1fb8cf332f6193b995

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