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Vulnerability DatabaseCVE-2025-39750
CVE-2025-39750:
Linux Kernel vulnerability analysis and mitigation
Overview
A vulnerability in the Linux kernel's ath12k WiFi driver was discovered and assigned CVE-2025-39750. The issue was reported on September 11, 2025, and involves incorrect TID (Traffic Identifier) cleanup handling when TID setup fails (NVD).
Technical details
The vulnerability occurs in the ath12k driver's TID handling mechanism. When an error occurs during ath12kdprxpeertidsetup(), the TID value is incorrectly incremented even though the corresponding TID is not actually allocated. This leads to ath12kdprxpeertiddelete() starting from an unallocated TID (NVD).
Impact
The vulnerability can result in freeing unallocated TID and potentially cause system crashes or out-of-bounds memory access (NVD).
Mitigation and workarounds
The issue has been resolved by correctly decrementing the TID before cleanup to match only the successfully allocated TIDs. Additionally, the tid-- operation was removed from the failure case of ath12kdprxpeerfrag_setup(), as the TID decrementing before cleanup in the loop addresses this issue (NVD).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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