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CVE-2026-90393: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: bpf: Fix potential UAF in bpf_netns_link_update_prog In bpf_netns_link_update_prog, the checks for old_prog and prog type are currently performed locklessly before acquiring netns_bpf_mutex. This creates a race condition that can lead to a UAF issue. If two threads concurrently execute BPF_LINK_UPDATE on the same netns link, the following execution path can trigger a UAF: CPU0 CPU1 bpf_netns_link_update_prog if (old_prog && old_prog != link->prog) return -EPERM; bpf_netns_link_update_prog if (old_prog && old_prog != link->prog) ... old_prog = xchg(&link->prog, new_prog); bpf_prog_put(old_prog); if (new_prog->type != link->prog->type) <-- trigger UAF Fix this by moving the old_prog and prog->type checks inside the netns_bpf_mutex critical section. Meanwhile, use guard() to simplify lock management and avoid all the goto jumping.

    Засегнати продукти

    • Linux Linux: 7f045a49fee04b5662cbdeaf0838f9322ae8c63a преди d462b5481d77ce7df8a5ff89a699386f00c9214d; 7f045a49fee04b5662cbdeaf0838f9322ae8c63a преди bdddf3e1493ee973619c154a57071ce67f78598b; 7f045a49fee04b5662cbdeaf0838f9322ae8c63a преди 79a66fd997d4eecf17302d613194879eb32e0986; 7f045a49fee04b5662cbdeaf0838f9322ae8c63a преди f4ce6803df4095777191d800bebc50219b615ca0; 7f045a49fee04b5662cbdeaf0838f9322ae8c63a преди 277168cb9d153ce8e9c3f9275670e32ae61b41d6; 7f045a49fee04b5662cbdeaf0838f9322ae8c63a преди bda86e9f31b9a296b6e64a51c91dc776fc9f613e; 7f045a49fee04b5662cbdeaf0838f9322ae8c63a преди 923f559e95b89b33c7e1793b3d8f7f4ec9b2e4b7; 7f045a49fee04b5662cbdeaf0838f9322ae8c63a преди 5c5997836381010fc5907b36bc17d3b19407e933
    • Linux Linux: 5.8; преди 5.8; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; от 7.3 нататък

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90393: Linux | freedomonline.bg