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CVE-2026-98830

Linux: wifi: wfx: validate MIB read length before copying to caller

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in819d4c1323e2a9b7329021d5367aa01add22b5dcAlso 02886c18a340da59df57365f29009e1258bfe333, 71d140099165de03128c00dd129f1eab21c6a3c4 and 1 moreCVE List
Published18 Oct 2026Updated 21 Oct 2026CVE List

What fixes it

  • 819d4c1323e2a9b7329021d5367aa01add22b5dcLinuxCVE List
  • 02886c18a340da59df57365f29009e1258bfe333LinuxCVE List
  • 71d140099165de03128c00dd129f1eab21c6a3c4LinuxCVE List
  • 7acb36fd60a3e7b858f12e69a919c3609b281408LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 12

  • Linuxaffected: f95a29d40782f4f0052a692a822de3ba044b19ff before 819d4c1323e2a9b7329021d5367aa01add22b5dcCVE List
  • Linuxaffected: f95a29d40782f4f0052a692a822de3ba044b19ff before 02886c18a340da59df57365f29009e1258bfe333CVE List
  • Linuxaffected: f95a29d40782f4f0052a692a822de3ba044b19ff before 71d140099165de03128c00dd129f1eab21c6a3c4CVE List
  • Linuxaffected: f95a29d40782f4f0052a692a822de3ba044b19ff before 7acb36fd60a3e7b858f12e69a919c3609b281408CVE List
  • Linuxaffected: f95a29d40782f4f0052a692a822de3ba044b19ff before ce67ebe9d8629776ce38e6995ae72fb903c828dbCVE List
  • Linuxaffected: 5.5CVE List
  • Linuxunaffected: all versions before 5.5CVE List
  • Linuxunaffected: 6.6.160 through 6.6.*CVE List
  • Linuxunaffected: 6.12.113 through 6.12.*CVE List
  • Linuxunaffected: 6.18.56 through 6.18.*CVE List
  • Linuxunaffected: 7.2.10 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 5