Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b27512368591fc959768df1f7dacf2a96b1bd036 before 65c25b588994dd422fea73fa322de56e1ae4a33b; affected b27512368591fc959768df1f7dacf2a96b1bd036 before 5a86d4e920d9783a198e39cf53f0e410fba5fbd6; affected b27512368591fc959768df1f7dacf2a96b1bd036 before 3c6629e859a2211a1fbb4868f915413f80001ca5; affected b27512368591fc959768df1f7dacf2a96b1bd036 before 672e5229e1ecfc2a3509b53adcb914d8b024a853 |
| Linux / Linux | affected 6.11; unaffected 0 before 6.11; unaffected 6.12.78 through 6.12.*; unaffected 6.18.20 through 6.18.*; unaffected 6.19.10 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.