Bug 2419934 (CVE-2023-53767)

Summary: CVE-2023-53767 kernel: Linux kernel: Denial of Service via memory leak in ath12k Wi-Fi driver
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in the Linux kernel's ath12k Wi-Fi driver. A local user could exploit a memory leak in the `ath12k_qmi_driver_event_work()` function. This occurs when the `ATH12K_FLAG_UNREGISTERING` bit is set, preventing the proper freeing of allocated memory. This memory leak can lead to a denial of service (DoS) on the system.
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Description OSIDB Bzimport 2025-12-08 07:09:55 UTC 
In the Linux kernel, the following vulnerability has been resolved:

wifi: ath12k: fix memory leak in ath12k_qmi_driver_event_work()

Currently the buffer pointed by event is not freed in case
ATH12K_FLAG_UNREGISTERING bit is set, this causes memory leak.

Add a goto skip instead of return, to ensure event and all the
list entries are freed properly.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1
Comment 1 Jon Moroney 2025-12-08 18:18:30 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120846-CVE-2023-53767-02ae@gregkh/T