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CVE-2025-71080: Linux

7.5

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

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Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ipv6: fix a BUG in rt6_get_pcpu_route() under PREEMPT_RT On PREEMPT_RT kernels, after rt6_get_pcpu_route() returns NULL, the current task can be preempted. Another task running on the same CPU may then execute rt6_make_pcpu_route() and successfully install a pcpu_rt entry. When the first task resumes execution, its cmpxchg() in rt6_make_pcpu_route() will fail because rt6i_pcpu is no longer NULL, triggering the BUG_ON(prev). It's easy to reproduce it by adding mdelay() after rt6_get_pcpu_route(). Using preempt_disable/enable is not appropriate here because ip6_rt_pcpu_alloc() may sleep. Fix this by handling the cmpxchg() failure gracefully on PREEMPT_RT: free our allocation and return the existing pcpu_rt installed by another task. The BUG_ON is replaced by WARN_ON_ONCE for non-PREEMPT_RT kernels where such races should not occur.

    Засегнати продукти

    • Linux Linux: d2d6422f8bd17c6bb205133e290625a564194496 преди 1dc33ad0867325f8d2c6d7b2a6f542d4f3121f66; d2d6422f8bd17c6bb205133e290625a564194496 преди 787515ccb2292f82eb0876993129154629a49651; d2d6422f8bd17c6bb205133e290625a564194496 преди 1adaea51c61b52e24e7ab38f7d3eba023b2d050d
    • Linux Linux: 6.12; преди 6.12; 6.12.64 до 6.12.*; 6.18.4 до 6.18.*; 6.19 до *

    История

    • 13 януари 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2025-71080: Linux | freedomonline.bg