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CVE-2026-64325: Linux

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon This patch is based on a BUG as reported by Bongani Hlope at https://lore.kernel.org/all/[email protected]/ When a channel-switch announcement (CSA) beacon is received, cfg80211 queues a wiphy work item that eventually calls mt7921_channel_switch_rx_beacon(). If the station disconnects (or the channel context is otherwise torn down) between the time the work is queued and the time it runs, the driver's dev->new_ctx pointer can already have been cleared to NULL. mt7921_channel_switch_rx_beacon() then dereferences new_ctx unconditionally, triggering a NULL pointer dereference at address 0x0: BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:mt7921_channel_switch_rx_beacon+0x1f/0x100 [mt7921_common] The same missing guard exists in mt7925_channel_switch_rx_beacon(), which shares the same code pattern introduced by the same commit. Add an early-return NULL check for dev->new_ctx in both mt7921_channel_switch_rx_beacon() and mt7925_channel_switch_rx_beacon(). When new_ctx is NULL there is no pending channel switch to process, so returning immediately is the correct and safe action. Oops-Analysis: http://oops.fenrus.org/reports/lkml/[email protected]/report.html

    Засегнати продукти

    • Linux Linux: 8aa2f59260eb66fc80378c158922ccb741ccc491 преди d16713c06006669c7162dfab1cedf4cb24429311; 8aa2f59260eb66fc80378c158922ccb741ccc491 преди 77e7b127472a191e086e1e0b1b051703f33b1801; 8aa2f59260eb66fc80378c158922ccb741ccc491 преди 351dd7d2c80d23e56dcce6faa4e62bea5b0877c7
    • Linux Linux: 6.14; преди 6.14; 6.18.57 до 6.18.*; 7.1.4 до 7.1.*; от 7.2 нататък

    История

    • 25 юли 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-64325: Linux | freedomonline.bg