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CVE-2026-53175: Linux, грешка в паметта

9.8

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

CVE радар: още уязвимости от този вид

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush On netns teardown, fqdir_pre_exit() walks the fqdir rhashtable and flushes every fragment queue that is not yet complete using inet_frag_queue_flush(). That helper frees all the skbs queued on the fragment queue but does not set INET_FRAG_COMPLETE, and leaves q->fragments_tail and q->last_run_head pointing at the freed skbs. The queue itself stays in the rhashtable. fqdir_pre_exit() first lowers high_thresh to 0 to stop new queue lookups, but it cannot stop a fragment that already obtained the queue through inet_frag_find() earlier and stalled just before taking the queue lock. Once that fragment resumes after the flush and takes the queue lock, it passes the INET_FRAG_COMPLETE check and then dereferences the freed fragments_tail. inet_frag_queue_insert() reads FRAG_CB() and ->len of that pointer and, on the append path, writes ->next_frag, causing a slab use-after-free. IPv6, nf_conntrack_reasm6 and 6lowpan reassembly share the same flush path and are affected as well. Reset rb_fragments, fragments_tail and last_run_head in inet_frag_queue_flush() so a flushed queue no longer points at the freed skbs. A fragment that resumes after the flush and takes the queue lock then finds an empty queue and starts a new run instead of dereferencing the freed fragments_tail. ip_frag_reinit() already performed this reset after its own flush, so drop the now duplicate code there.

    Засегнати продукти

    • Linux Linux: 22ee4010866da81aeee08e1ea3fddbe418feb212 преди 0e823ca0e7391630784ae7dd0981b7ad170a93d9; 543555954b1ee8d1903a7020324efb41b0c97428 преди c22599cc90e1cd5f8129c8670bd68a02ff7177b4; c70df25214ac9b32b53e18e6ae3b8f073ffa6903 преди 89b909e9704587bfecc1aab1d37e98faee03b9f9; 006a5035b495dec008805df249f92c22c89c3d2e преди 010c3313a4d178dc2d3ce958d2e5cb055e2864c1; 006a5035b495dec008805df249f92c22c89c3d2e преди 32594b09854970d7ba83eb2dc8c69a2edd158c8e; 6.12.93 преди 6.12.94; 6.18.3 преди 6.18.36
    • Linux Linux: 6.19; преди 6.19; 6.12.94 до 6.12.*; 6.18.36 до 6.18.*; 7.0.13 до 7.0.*; 7.1 до *
    • Red Hat Red Hat Enterprise Linux 10
    • Red Hat Red Hat Enterprise Linux 6
    • Red Hat Red Hat Enterprise Linux 7
    • Red Hat Red Hat Enterprise Linux 8
    • Red Hat Red Hat Enterprise Linux 9

    Вид слабост

    История

    • 25 юни 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-53175: Linux, грешка в паметта | freedomonline.bg