Bug 2516926 (CVE-2026-74326)

Summary: CVE-2026-74326 kernel: wifi: mt76: mt7921: fix resource leak in probe error path
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's mt76 wireless driver. This flaw occurs when certain memory allocation or I/O mapping functions fail during the probe error path, leading to a failure to deallocate previously reserved resources. This can result in a resource leak, potentially leading to system instability or a denial of service (DoS) condition.
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Description OSIDB Bzimport 2026-08-15 06:40:45 UTC 
In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7921: fix resource leak in probe error path

When pcim_iomap_region() or devm_kmemdup() fail, the code returns
directly without cleaning up previously allocated resources:
  - mt76_device allocated by mt76_alloc_device()
  - pci irq vectors allocated by pci_alloc_irq_vectors()
Fix this by jumping to the existing error cleanup path instead of
returning directly.
Comment 1 Keith Grant 2026-08-20 17:09:31 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081554-CVE-2026-74326-72b3@gregkh/T