SB2026100717 - Use of Uninitialized Variable in Linux kernel brcmfmac cyw driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use of Uninitialized Variable (CVE-ID: CVE-2026-98350)

CWE-ID: CWE-457 - Use of Uninitialized Variable

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service affecting subsequent wireless association requests that include a PMKID.

The vulnerability exists due to use of an uninitialized PMKID field in brcmf_cyw_external_auth() when reporting successful external authentication without transferring the supplied PMKID to the firmware. A local user can initiate successful external authentication with a supplied PMKID to cause a denial of service affecting subsequent wireless association requests that include a PMKID.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6fba6233e9ca7718661e53555a3961c58772c21a
• https://git.kernel.org/stable/c/c2cf589c7d546557ed60c43f2ec014279265dfbf
• https://git.kernel.org/stable/c/e2de8d5eb2984416affdd9559e55f37c7f1bbf47