CVE-2026-31394 — NULL Pointer Dereference in Linux
Severity
5.5MEDIUM
No vectorEPSS
0.0%
top 93.77%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedApr 3
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 dere…
Affected Packages2 packages
▶CVEListV5linux/linuxb27512368591fc959768df1f7dacf2a96b1bd036 — 65c25b588994dd422fea73fa322de56e1ae4a33b+4
🔴Vulnerability Details
3GHSA▶
GHSA-96f2-8m7p-q7j4: In the Linux kernel, the following vulnerability has been resolved:
mac80211: fix crash in ieee80211_chan_bw_change for AP_VLAN stations
ieee80211_c↗2026-04-03
OSV▶
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_cha↗2026-04-03
📋Vendor Advisories
3Debian▶
CVE-2026-31394: linux - In the Linux kernel, the following vulnerability has been resolved: mac80211: f...↗2026