GHSA-JGRQ-7MCG-MJWV
Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31In 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": [],
"aliases": [
"CVE-2026-98338"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-06T09:18:26Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: ibss: ref BSS entry for joined event\n\nWhen the IBSS is joined, we only record the BSSID/channel in the event\nand look up the BSS entry when processing it. However, that\u0027s racy,\ne.g. a new scan with NL80211_SCAN_FLAG_FLUSH can remove it, causing a\nwarning in the event work:\n\n !bss\n WARNING: net/wireless/ibss.c:37 at __cfg80211_ibss_joined+0x3d3/0x440\n Workqueue: cfg80211 cfg80211_event_work\n cfg80211_process_wdev_events+0x39f/0x5b0 net/wireless/util.c:1144\n cfg80211_process_rdev_events+0xa1/0x110 net/wireless/util.c:1179\n cfg80211_event_work+0x2f/0x40 net/wireless/core.c:393\n\nDo the lookup early (the driver is expected to only join an IBSS that\nhas a BSS entry) and keep a reference to it.",
"id": "GHSA-jgrq-7mcg-mjwv",
"modified": "2026-10-06T09:31:35Z",
"published": "2026-10-06T09:31:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98338"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/708f9d43d6a2eb9c6b83fe62af628de9dffd9314"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b"
}
],
"schema_version": "1.4.0",
"severity": []
}
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