Answer in brief
CVE-2026-68405 records a Unknown severity vulnerability in wifi: mac80211: free AP_VLAN bc_buf SKBs outside IRQ lock. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=397a7a24ef8c2967a3e8090013f9c54714110c48 <be9dfcb0654c1f6c0fce7ba2a909683bb6f1e0ef || >=397a7a24ef8c2967a3e8090013f9c54714110c48 <962f755a47d7ec3bbf6c709697d7f4c5f798441d || >=397a7a24ef8c2967a3e8090013f9c54714110c48 <a424985c3ef2a87ce6057a853e18d0c441a86be8 || >=397a7a24ef8c2967a3e8090013f9c54714110c48 <4b8abf43bf34791c99d99dc3be13f897adefc461 || >=397a7a24ef8c2967a3e8090013f9c54714110c48 <f3858d5b1432098c1936e03d6e03dd0e33facf60 | be9dfcb0654c1f6c0fce7ba2a909683bb6f1e0ef, 962f755a47d7ec3bbf6c709697d7f4c5f798441d, a424985c3ef2a87ce6057a853e18d0c441a86be8, 4b8abf43bf34791c99d99dc3be13f897adefc461, f3858d5b1432098c1936e03d6e03dd0e33facf60 |
| Linux/Linuxgeneric | 3.9 | Not reported |
| Linux/Linuxgeneric | >=397a7a24ef8c2967a3e8090013f9c54714110c48 <0d2619e708e2ef02ba1c91642ea261d3f19d8f9a || >=397a7a24ef8c2967a3e8090013f9c54714110c48 <659a81b62a61440b85e02c09903be861ae7679e5 || >=397a7a24ef8c2967a3e8090013f9c54714110c48 <aa01ef0ebbc3289154229ef58e65baf289eb9789 || >=397a7a24ef8c2967a3e8090013f9c54714110c48 <be9dfcb0654c1f6c0fce7ba2a909683bb6f1e0ef || >=397a7a24ef8c2967a3e8090013f9c54714110c48 <962f755a47d7ec3bbf6c709697d7f4c5f798441d || >=397a7a24ef8c2967a3e8090013f9c54714110c48 <a424985c3ef2a87ce6057a853e18d0c441a86be8 || >=397a7a24ef8c2967a3e8090013f9c54714110c48 <4b8abf43bf34791c99d99dc3be13f897adefc461 || >=397a7a24ef8c2967a3e8090013f9c54714110c48 <f3858d5b1432098c1936e03d6e03dd0e33facf60 | 0d2619e708e2ef02ba1c91642ea261d3f19d8f9a, 659a81b62a61440b85e02c09903be861ae7679e5, aa01ef0ebbc3289154229ef58e65baf289eb9789, be9dfcb0654c1f6c0fce7ba2a909683bb6f1e0ef, 962f755a47d7ec3bbf6c709697d7f4c5f798441d, a424985c3ef2a87ce6057a853e18d0c441a86be8, 4b8abf43bf34791c99d99dc3be13f897adefc461, f3858d5b1432098c1936e03d6e03dd0e33facf60 |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
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: 1. attach ACK-status state 1. clear the running state 2. queue a multicast SKB on 2. take ps->bc_buf.lock with IRQs parent ps->bc_buf disabled 3. unlink the AP_VLAN SKB 4. call ieee80211_free_txskb() 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
Quoted source text, attributed separately from HOL analysis.