What’s Vulnerable › Vulnerabilities

CVE-2026-98830: wifi: wfx: validate MIB read length before copying to caller

• 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 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wfx: validate MIB read length before copying to caller wfx_hif_read_mib() copies reply->length bytes from the firmware response into the caller-provided buffer without checking that reply->length does not exceed val_len. A firmware response with a length field larger than expected overruns the caller buffer and reads past the end of the reply allocation. Replace the dead -ENOMEM check with an active validation that reply->length fits within val_len before the memcpy.

Affected products

• Linux: 5.5 — fixed in 7.3

How to fix

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

References

• https://git.kernel.org/stable/c/02886c18a340da59df57365f29009e1258bfe333
• https://git.kernel.org/stable/c/71d140099165de03128c00dd129f1eab21c6a3c4
• https://git.kernel.org/stable/c/7acb36fd60a3e7b858f12e69a919c3609b281408
• https://git.kernel.org/stable/c/819d4c1323e2a9b7329021d5367aa01add22b5dc
• https://git.kernel.org/stable/c/b8310b55e53622a393d14af4939f620c1828778b
• https://git.kernel.org/stable/c/ce67ebe9d8629776ce38e6995ae72fb903c828db

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