All vulnerabilities
CVE-2026-98341

Linux: wifi: cfg80211: don't free driver-owned scan requests

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
7.8High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.14%Chance of exploitation activity in the next 30 days, higher than 2% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version yet
Published6 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version.

Description

In the Linux kernel, the following vulnerability has been resolved:

wifi: cfg80211: don't free driver-owned scan requests

When an interface goes down while a scan is running, cfg80211 completes the scan towards userspace and frees the scan request. However, the driver can be convinced that it owns the request, since the cancellation is (intended to be) asynchronous.

The WARN_ON() in the netdev notifier was meant to catch this, but it's not actually avoidable, so it triggers and we get a UAF in scan_done().

There doesn't seem to be a great way around it, so just track that the driver is still convinced it owns the request, and then just free it on completion if it was already cancelled. Also remove the warnings since they can trigger in the intended architecture.

Text from CVE List

Affected versions 8

  • Linuxaffected: 4a58e7c38443154fce1b47910e1a9184f65c5d72 before e8c75736cfd0c6c87562cda2312e3fe5e2227955CVE List
  • Linuxaffected: 4a58e7c38443154fce1b47910e1a9184f65c5d72 before cf6da29d17994865f73ca70976495ea856909c63CVE List
  • Linuxaffected: 4a58e7c38443154fce1b47910e1a9184f65c5d72 before dab68a74e90b8e07f08ed9deaa5884857a3cfe89CVE List
  • Linuxaffected: 3.14CVE List
  • Linuxunaffected: all versions before 3.14CVE List
  • Linuxunaffected: 6.18.54 through 6.18.*CVE List
  • Linuxunaffected: 7.2.8 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 3