CVE-2026-98338 is a vulnerability in Linux Kernel
Published on October 6, 2026
wifi: cfg80211: ibss: ref BSS entry for joined event
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.
Products Associated with CVE-2026-98338
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Affected Versions
Linux:- Version 667503ddcb96f3b10211f997fe55907fa7509841 and below b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b is affected.
- Version 667503ddcb96f3b10211f997fe55907fa7509841 and below 708f9d43d6a2eb9c6b83fe62af628de9dffd9314 is affected.
- Version 2.6.32 is affected.
- Before 2.6.32 is unaffected.
- Version 7.2.8, <= 7.2.* is unaffected.
- Version 7.3-rc4, <= * is unaffected.