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CVE-2026-46015: Linux, логическа грешка

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.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: tcp: call sk_data_ready() after listener migration When inet_csk_listen_stop() migrates an established child socket from a closing listener to another socket in the same SO_REUSEPORT group, the target listener gets a new accept-queue entry via inet_csk_reqsk_queue_add(), but that path never notifies the target listener's waiters. A nonblocking accept() still works because it checks the queue directly, but poll()/epoll_wait() waiters and blocking accept() callers can also remain asleep indefinitely. Call READ_ONCE(nsk->sk_data_ready)(nsk) after a successful migration in inet_csk_listen_stop(). However, after inet_csk_reqsk_queue_add() succeeds, the ref acquired in reuseport_migrate_sock() is effectively transferred to nreq->rsk_listener. Another CPU can then dequeue nreq via accept() or listener shutdown, hit reqsk_put(), and drop that listener ref. Since listeners are SOCK_RCU_FREE, wrap the post-queue_add() dereferences of nsk in rcu_read_lock()/rcu_read_unlock(), which also covers the existing sock_net(nsk) access in that path. The reqsk_timer_handler() path does not need the same changes for two reasons: half-open requests become readable only after the final ACK, where tcp_child_process() already wakes the listener; and once nreq is visible via inet_ehash_insert(), the success path no longer touches nsk directly.

Засегнати продукти

  • Linux Linux: 54b92e84193749c9968aff2dd46e3b0f42643e18 преди 7aa7933a5607b1e5b56f322d17265c1d0ea02c51; 54b92e84193749c9968aff2dd46e3b0f42643e18 преди 14e9bb6eba8f59dcc637702e4744ae5e30660d76; 54b92e84193749c9968aff2dd46e3b0f42643e18 преди ab5fdcd535645f6dbe6e9e21d96a08d141e88b4b; 54b92e84193749c9968aff2dd46e3b0f42643e18 преди bebd058ef40c67a81fe6d9ee8beaa4ede90e0704; 54b92e84193749c9968aff2dd46e3b0f42643e18 преди 83bb57635d7cbafde32f865b577ecfd969f02337; 54b92e84193749c9968aff2dd46e3b0f42643e18 преди 12625b4da84caf4d84a04988710a7b9bcf702b18; 54b92e84193749c9968aff2dd46e3b0f42643e18 преди 3864c6ba1e041bc75342353a70fa2a2c6f909923
  • Linux Linux: 5.14; преди 5.14; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.140 до 6.6.*; 6.12.86 до 6.12.*; 6.18.27 до 6.18.*; 7.0.4 до 7.0.*; от 7.1 нататък
  • Siemens: още 4 продукта, добавени от Siemens

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SIMATIC S7-1500 TM MFP - GNU/Linux subsystem, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Вид слабост

История

  • 27 май 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-46015: Linux, логическа грешка | freedomonline.bg