CVE-2023-53715
wifi: brcmfmac: cfg80211: Pass the PMK in binary instead of hex
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.
INFO
Published Date :
Oct. 22, 2025, 2:15 p.m.
Last Modified :
Oct. 22, 2025, 9:12 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to the latest version.
- Apply the patch for the brcmfmac driver.
- Clear the PMK structure before setting.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-53715.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-53715 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-53715
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-53715 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-53715 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Oct. 22, 2025
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/1687845eb8f37360a9ee849a3587ab659b090773 Added Reference https://git.kernel.org/stable/c/2bc34facb90ceeff6f8c17d2006575a6d07c3825 Added Reference https://git.kernel.org/stable/c/2fa3a5226b05e0a797c68b9609dcebe0cd236b27 Added Reference https://git.kernel.org/stable/c/4e8dc0e5c7636efaadbd7e488acd34b4291c0431 Added Reference https://git.kernel.org/stable/c/56c7e9c39bd54fd753c0c4b1ed10278cbd3a5f02 Added Reference https://git.kernel.org/stable/c/89b89e52153fda2733562776c7c9d9d3ebf8dd6d Added Reference https://git.kernel.org/stable/c/e242c66f7ecfe8f5b6eb308f4ea464fd8589c866 Added Reference https://git.kernel.org/stable/c/f8a6c53ff1d91acd5a20eb627edbffd816eb9a4e