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CVE-2026-93137: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: bpf: Fix use-after-free on mm_struct in bpf_find_vma() bpf_find_vma() reads task->mm and calls mmap_read_trylock(mm) without holding a reference on the mm. On a foreign task, a concurrent exit_mm() can free the mm_struct between the lockless read and the trylock, resulting in a use-after-free. mm_struct is not SLAB_TYPESAFE_BY_RCU. For the current task, task->mm is stable. For a foreign task, pin the mm under task->alloc_lock and release it with mmput_async(), mirroring commit d8e27d2d22b6 ("bpf: fix mm lifecycle in open-coded task_vma iterator"). Use spin_trylock() instead of get_task_mm() so BPF context does not block on alloc_lock. Reject irqs-disabled contexts and !CONFIG_MMU on the foreign-task path because dropping the mm reference is not safe there. Race: CPU0 (BPF program) CPU1 (exiting task) ============================ ========================== bpf_find_vma(foreign_task): mm = task->mm exit_mm(): task->mm = NULL mmput(mm) -> frees mm_struct mmap_read_trylock(mm) // UAF on mm

    Засегнати продукти

    • Linux Linux: 7c7e3d31e7856a8260a254f8c71db416f7f9f5a1 преди db347840d6b6ee9bb9b8e4a985d4b4419f9f3200; 7c7e3d31e7856a8260a254f8c71db416f7f9f5a1 преди 8e1101fc4118019a69c96ced4aec93164f89cbd5; 7c7e3d31e7856a8260a254f8c71db416f7f9f5a1 преди c7ad910e987008e125eeff448892e86852173384; 7c7e3d31e7856a8260a254f8c71db416f7f9f5a1 преди 86d54cf069fc5ae2e111c87933bebf6eb527978e; 7c7e3d31e7856a8260a254f8c71db416f7f9f5a1 преди 2b2a903bee56d312539046d9defa8023eec94760; 7c7e3d31e7856a8260a254f8c71db416f7f9f5a1 преди 47b079e2117a2ee52e21f8b72935900c702fc0b5
    • Linux Linux: 5.17; преди 5.17; 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-2026-93137: Linux | freedomonline.bg