What’s Vulnerable › Vulnerabilities

CVE-2026-98350: wifi: brcmfmac: cyw: pass PMKID to firmware if present

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: cyw: pass PMKID to firmware if present Zero out auth_status on initialization. Otherwise, garbage will leak from the stack to the firmware (when ssid is less than 32 bytes and/or when params->pmkid is set). Then, pass the params->pmkid to the firmware (without it, the firmware caches a garbage PMKID on successful authentication and denies a subsequent association request that includes the PMKID).

Affected products

• Linux kernel: 6.16 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

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

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