CVE-2026-98338 PUBLISHED

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

Assigner: Linux
Reserved: 25.09.2026 Published: 06.10.2026 Updated: 06.10.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 667503ddcb96f3b10211f997fe55907fa7509841 to b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b (excl.)
  • affected from 667503ddcb96f3b10211f997fe55907fa7509841 to 708f9d43d6a2eb9c6b83fe62af628de9dffd9314 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 2.6.32 is affected
  • unaffected from 0 to 2.6.32 (excl.)
  • unaffected from 7.2.8 to 7.2.* (incl.)
  • unaffected from 7.3-rc4 to * (incl.)

References