CVE-2026-98338
N/A
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 667503ddcb96f3b10211f997fe55907fa7509841 < b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b | affected |
| Linux | Linux | 667503ddcb96f3b10211f997fe55907fa7509841 < 708f9d43d6a2eb9c6b83fe62af628de9dffd9314 | affected |
| Linux | Linux | 2.6.32 | affected |
| Linux | Linux | 0 < 2.6.32 | unaffected |
| Linux | Linux | 7.2.8 <= 7.2.* | unaffected |
| Linux | Linux | 7.3-rc4 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b
- https://git.kernel.org/stable/c/708f9d43d6a2eb9c6b83fe62af628de9dffd9314
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