CVE-2023-53715 Details
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: cfg80211: Pass the PMK in binary instead of hex Apparently the hex passphrase mechanism does not work on newer chips/firmware (e.g. BCM4387). It seems there was a simple way of passing it in binary all along, so use that and avoid the hexification. OpenBSD has been doing it like this from the beginning, so this should work on all chips. Also clear the structure before setting the PMK. This was leaking uninitialized stack contents to the device.
A vulnerability in the Linux kernel's handling of the Pairwise Master Key (PMK) for Broadcom Wi-Fi chipsets, specifically the BCM4387, has been addressed. The issue arose because the hex passphrase mechanism was incompatible with newer chips and firmware. The vulnerability allowed uninitialized stack contents to be leaked to the device. The kernel now passes the PMK in binary format, which is compatible with all chipsets, and clears the structure before transmission to prevent data leakage.
Users can update to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the patched kernel are available on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 22, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/1687845eb8f37360a9ee849a3587ab659b090773 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/2bc34facb90ceeff6f8c17d2006575a6d07c3825 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/2fa3a5226b05e0a797c68b9609dcebe0cd236b27 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/4e8dc0e5c7636efaadbd7e488acd34b4291c0431 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/56c7e9c39bd54fd753c0c4b1ed10278cbd3a5f02 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/89b89e52153fda2733562776c7c9d9d3ebf8dd6d | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/e242c66f7ecfe8f5b6eb308f4ea464fd8589c866 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/f8a6c53ff1d91acd5a20eb627edbffd816eb9a4e | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | All versions |
CPE
Remediation
| |
| Broadcom brcmfmac | All versions |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Oct 22, 2025 | New CVE Received | kernel.org |
Volerion