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]
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
b27512368591fc959768df1f7dacf2a96b1bd036 to < 65c25b588994dd422fea73fa322de56e1ae4a33baffectedb27512368591fc959768df1f7dacf2a96b1bd036 to < 5a86d4e920d9783a198e39cf53f0e410fba5fbd6affectedb27512368591fc959768df1f7dacf2a96b1bd036 to < 3c6629e859a2211a1fbb4868f915413f80001ca5affectedb27512368591fc959768df1f7dacf2a96b1bd036 to < 672e5229e1ecfc2a3509b53adcb914d8b024a853affected
Linux Linux
Default version status: affected
6.11affected0 to < 6.11unaffected6.12.78 to ≤ 6.12.*unaffected6.18.20 to ≤ 6.18.*unaffected6.19.10 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected