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CVE-2026-72321: Linux

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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: ipv4: igmp: Fix potential memory leaks in igmp_mod_timer() and igmp_stop_timer() When a timer is deleted and not re-armed in igmp_mod_timer(), or stopped in igmp_stop_timer(), the code currently decrements the reference counter of the multicast list entry @im using refcount_dec(&im->refcnt). However, both functions can be called from the RCU reader path: - igmp_mod_timer() via igmp_heard_query() -> for_each_pmc_rcu() - igmp_stop_timer() via igmp_rcv() -> igmp_heard_report() If the group im was concurrently removed from the list by ip_mc_dec_group(), its reference count might have already been decremented to 1. In this case, timer_delete() succeeds, and refcount_dec() decrements the refcount from 1 to 0. Since refcount_dec() does not free the object when it hits 0 (unlike ip_ma_put()), the im structure is leaked. Fix this by using ip_ma_put(im) instead of refcount_dec(&im->refcnt), and deferring the put until after the spinlock is released.

    Засегнати продукти

    • Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди d4fe30f4671033a27fba077b3976dc113ffc0169; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 2d0effadf8d2cc9d006e4c4ab0ab6737aed28d77; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 40d6360ccf9bcbe17b5cb248a84e8e004aac2faa; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди f60ec3058a85447008b88b762c859d336163acb3; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 95128dc74425ec19ed4f2077ccc651e791ff4b75; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 3546deaa0c30a14c7cdb5dc8f2432cb428f0cd36
    • Linux Linux: 2.6.12; преди 2.6.12; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; 7.2 до *

    История

    • 15 август 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-72321: Linux | freedomonline.bg