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CVE-2026-98338

Linux: wifi: cfg80211: ibss: ref BSS entry for joined event

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)0.16%Chance of exploitation activity in the next 30 days, higher than 5% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in708f9d43d6a2eb9c6b83fe62af628de9dffd9314Fixed versionCVE List
Published6 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 708f9d43d6a2eb9c6b83fe62af628de9dffd9314LinuxCVE 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: cfg80211: ibss: ref BSS entry for joined event

When the IBSS is joined, we only record the BSSID/channel in the event and look up the BSS entry when processing it. However, that's racy, e.g. a new scan with NL80211_SCAN_FLAG_FLUSH can remove it, causing a warning in the event work:

!bss WARNING: net/wireless/ibss.c:37 at __cfg80211_ibss_joined+0x3d3/0x440 Workqueue: cfg80211 cfg80211_event_work cfg80211_process_wdev_events+0x39f/0x5b0 net/wireless/util.c:1144 cfg80211_process_rdev_events+0xa1/0x110 net/wireless/util.c:1179 cfg80211_event_work+0x2f/0x40 net/wireless/core.c:393

Do the lookup early (the driver is expected to only join an IBSS that has a BSS entry) and keep a reference to it.

Text from CVE List

Affected versions 6

  • Linuxaffected: 667503ddcb96f3b10211f997fe55907fa7509841 before b0e3f019e461ac42e45aa3ec1216cefaca2f4a8bCVE List
  • Linuxaffected: 667503ddcb96f3b10211f997fe55907fa7509841 before 708f9d43d6a2eb9c6b83fe62af628de9dffd9314CVE List
  • Linuxaffected: 2.6.32CVE List
  • Linuxunaffected: all versions before 2.6.32CVE List
  • Linuxunaffected: 7.2.8 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 2