Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
In the Linux kernel, the following vulnerability has been resolved: mac80211: fix crash in ieee80211_chan_bw_change for AP_VLAN stations ieee80211_chan_bw_change() iterates all stations and accesses link->reserved.oper via sta->sdata->link[link_id]. For stations on AP_VLAN interfaces (e.g. 4addr WDS clients), sta->sdata points to the VLAN sdata, whose link never participates in chanctx reservations. This leaves link->reserved.oper zero-initialized with chan == NULL, causing a NULL pointer dereference in __ieee80211_sta_cap_rx_bw() when accessing chandef->chan->band during CSA. Resolve the VLAN sdata to its parent AP sdata using get_bss_sdata() before accessing link data. [also change sta->sdata in ARRAY_SIZE even if it doesn't matter]
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
1 version affected across 1 product
CVE-2026-31394 In the Linux kernel, the following vulnerability has been resolved: mac80211 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-31394
Post summary
The note announces that CVE‑2026‑31394, a Linux kernel issue in mac80211, has been resolved, implying a vendor patch has been applied.
CVE-2026-31394 In the Linux kernel, the following vulnerability has been resolved: mac80211: fix crash in ieee80211_chan_bw_change for AP_VLAN stations ieee80211_chan_bw_change() … https://www.cve.org/CVERecord?id=CVE-2026-31394
Post summary
The post announces that CVE-2026-31394 has been fixed in the Linux kernel, detailing a crash in the ieee80211_chan_bw_change function for AP_VLAN stations.
5 of 5 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| OS | linux | linux_kernel | - | - | - |
| OS | linux | linux_kernel | 7.0 | - | - |
| OS | linux | linux_kernel | 7.0 | - | - |
| OS | linux | linux_kernel | 7.0 | - | - |
| OS | linux | linux_kernel | 7.0 | - | - |