CVE-2026-31394: Linux

Описание

Оригинално описание

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]

Засегнати продукти

• Linux Linux: b27512368591fc959768df1f7dacf2a96b1bd036 преди 65c25b588994dd422fea73fa322de56e1ae4a33b; b27512368591fc959768df1f7dacf2a96b1bd036 преди 5a86d4e920d9783a198e39cf53f0e410fba5fbd6; b27512368591fc959768df1f7dacf2a96b1bd036 преди 3c6629e859a2211a1fbb4868f915413f80001ca5; b27512368591fc959768df1f7dacf2a96b1bd036 преди 672e5229e1ecfc2a3509b53adcb914d8b024a853
• Linux Linux: 6.11; преди 6.11; 6.12.78 до 6.12.*; 6.18.20 до 6.18.*; 6.19.10 до 6.19.*; от 7.0 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-31394
• https://nvd.nist.gov/vuln/detail/CVE-2026-31394
• https://git.kernel.org/stable/c/65c25b588994dd422fea73fa322de56e1ae4a33b
• https://git.kernel.org/stable/c/5a86d4e920d9783a198e39cf53f0e410fba5fbd6
• https://git.kernel.org/stable/c/3c6629e859a2211a1fbb4868f915413f80001ca5
• https://git.kernel.org/stable/c/672e5229e1ecfc2a3509b53adcb914d8b024a853