Linux Kernel: wfx MIB Read Length Validation Vulnerability
CVE-2026-98830 Published on October 18, 2026
wifi: wfx: validate MIB read length before copying to caller
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.
Products Associated with CVE-2026-98830
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Affected Versions
Linux:- Version f95a29d40782f4f0052a692a822de3ba044b19ff and below 02886c18a340da59df57365f29009e1258bfe333 is affected.
- Version f95a29d40782f4f0052a692a822de3ba044b19ff and below 71d140099165de03128c00dd129f1eab21c6a3c4 is affected.
- Version f95a29d40782f4f0052a692a822de3ba044b19ff and below 7acb36fd60a3e7b858f12e69a919c3609b281408 is affected.
- Version f95a29d40782f4f0052a692a822de3ba044b19ff and below ce67ebe9d8629776ce38e6995ae72fb903c828db is affected.
- Version 5.5 is affected.
- Before 5.5 is unaffected.
- Version 6.12.113, <= 6.12.* is unaffected.
- Version 6.18.56, <= 6.18.* is unaffected.
- Version 7.2.10, <= 7.2.* is unaffected.
- Version 7.3-rc6, <= * is unaffected.