What’s Vulnerable › Vulnerabilities

CVE-2026-98828: wifi: ath9k: reject short WMI command responses

• 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: 2026-10-18 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: reject short WMI command responses ath9k_wmi_rsp_callback() removes the validated WMI header and copies the number of bytes expected by the waiting command into its response buffer. A device response shorter than that expectation can therefore be read beyond the skb payload. Record -EMSGSIZE for a short response, complete the waiter, and return the stored status from the command path. This also prevents callers from consuming stale response bytes as a successful reply.

Affected products

• Linux kernel: 2.6.35 — 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/03ef61d05aa26022327f971b790f07e6bf6e35d6
• https://git.kernel.org/stable/c/93ce8ea70451e800601bc9444aa33043de15d67b
• https://git.kernel.org/stable/c/a3b0137c855a61371d9cf9993b8bcc33c9798202
• https://git.kernel.org/stable/c/e0c21130c1c7791ba73b19a3a9ea767c8cd43745

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