-

CVE-2026-31394

mac80211: fix crash in ieee80211_chan_bw_change for AP_VLAN stations

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]
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version b27512368591fc959768df1f7dacf2a96b1bd036
Version < 65c25b588994dd422fea73fa322de56e1ae4a33b
Status affected
Version b27512368591fc959768df1f7dacf2a96b1bd036
Version < 5a86d4e920d9783a198e39cf53f0e410fba5fbd6
Status affected
Version b27512368591fc959768df1f7dacf2a96b1bd036
Version < 3c6629e859a2211a1fbb4868f915413f80001ca5
Status affected
Version b27512368591fc959768df1f7dacf2a96b1bd036
Version < 672e5229e1ecfc2a3509b53adcb914d8b024a853
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.11
Status affected
Version 0
Version < 6.11
Status unaffected
Version <= 6.12.*
Version 6.12.78
Status unaffected
Version <= 6.18.*
Version 6.18.20
Status unaffected
Version <= 6.19.*
Version 6.19.10
Status unaffected
Version <= *
Version 7.0
Status unaffected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.03% 0.07
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.