CVE-2026-68405None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: free AP_VLAN bc_buf SKBs outside IRQ lock ieee80211_do_stop() removes AP_VLAN packets from the parent AP ps->bc_buf while holding ps->bc_buf.lock with …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: free AP_VLAN bc_buf SKBs outside IRQ lock
ieee80211_do_stop() removes AP_VLAN packets from the parent AP ps->bc_buf while holding ps->bc_buf.lock with IRQs disabled. It then calls ieee80211_free_txskb() before dropping the lock.
ieee80211_free_txskb() is not just a passive SKB release. For SKBs with TX status state it can report a dropped frame through cfg80211/nl80211, and that path can reach netlink tap transmit. This is the same reason the pending queue cleanup in ieee80211_do_stop() already unlinks SKBs under the queue lock and frees them after IRQ state is restored.
The buggy scenario involves two paths, with each column showing the order within that path:
AP_VLAN management TX: AP_VLAN stop:
Unlink matching AP_VLAN SKBs from ps->bc_buf under the existing lock, but move them to a local free queue. Drop the lock and restore IRQ state before calling ieee80211_free_txskb().
WARNING: kernel/softirq.c:430 at __local_bh_enable_ip
Linux >= 397a7a24ef8c2967a3e8090013f9c54714110c48 < 0d2619e708e2ef02ba1c91642ea261d3f19d8f9aLinux >= 397a7a24ef8c2967a3e8090013f9c54714110c48 < 659a81b62a61440b85e02c09903be861ae7679e5Linux >= 397a7a24ef8c2967a3e8090013f9c54714110c48 < aa01ef0ebbc3289154229ef58e65baf289eb9789Linux >= 397a7a24ef8c2967a3e8090013f9c54714110c48 < be9dfcb0654c1f6c0fce7ba2a909683bb6f1e0efLinux >= 397a7a24ef8c2967a3e8090013f9c54714110c48 < 962f755a47d7ec3bbf6c709697d7f4c5f798441dLinux >= 397a7a24ef8c2967a3e8090013f9c54714110c48 < a424985c3ef2a87ce6057a853e18d0c441a86be8Linux >= 397a7a24ef8c2967a3e8090013f9c54714110c48 < 4b8abf43bf34791c99d99dc3be13f897adefc461Linux >= 397a7a24ef8c2967a3e8090013f9c54714110c48 < f3858d5b1432098c1936e03d6e03dd0e33facf60Linux 3.9Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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