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Vulnerability DatabaseCVE-2023-53715
CVE-2023-53715:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2023-53715 affects the Linux kernel's wifi brcmfmac driver. The vulnerability was published on October 22, 2025 and involves issues with the PMK (Pairwise Master Key) handling in the cfg80211 interface (NVD).
Technical details
The vulnerability relates to the hex passphrase mechanism in the brcmfmac wifi driver that doesn't work properly on newer chips/firmware (specifically mentioned for BCM4387). The issue involves passing the PMK in hex format instead of binary, and there was uninitialized stack contents being leaked to the device. The fix involves passing the PMK directly in binary format, which is noted to be compatible with all chips as evidenced by OpenBSD's implementation (NVD).
Impact
The vulnerability could lead to information disclosure as it was leaking uninitialized stack contents to the device (NVD).
Mitigation and workarounds
The issue has been resolved in the Linux kernel by modifying the PMK handling to pass it in binary format instead of hex, and by properly clearing the structure before setting the PMK (NVD).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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