Към съдържанието
Търсене

CVE-2026-72491: Linux

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.

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: net/9p: fix race condition on rdma->state in trans_rdma.c The rdma->state field is modified without holding req_lock in both recv_done() and p9_cm_event_handler(), while rdma_request() accesses the same field under the req_lock spinlock. This inconsistent locking creates a race condition: - recv_done() running in softirq completion context sets rdma->state = P9_RDMA_FLUSHING without acquiring req_lock - p9_cm_event_handler() modifies rdma->state at multiple points (ADDR_RESOLVED, ROUTE_RESOLVED, ESTABLISHED, CLOSED) without req_lock - rdma_request() uses spin_lock_irqsave(&rdma->req_lock, flags) to protect the read-modify-write of rdma->state The race can cause lost state transitions: recv_done() or the CM event handler could set state to FLUSHING/CLOSED while rdma_request() is concurrently checking or modifying state under the lock, leading to the FLUSHING transition being silently overwritten by CLOSING. This corrupts the connection state machine and can cause use-after-free on RDMA request objects during teardown. Fix by adding req_lock protection to all rdma->state modifications in recv_done() and p9_cm_event_handler(), matching the pattern already used in rdma_request(). Use spin_lock_irqsave/spin_unlock_irqrestore in the CM event handler since it can race with recv_done() which runs in softirq context. Tested with a kernel module that races two threads (simulating rdma_request and recv_done/CM handler) on rdma->state with proper locking: 5.5M+ FLUSHING writes over 27M iterations with 0 lost transitions.

Засегнати продукти

  • Linux Linux: 473c7dd1d7b59ff8f88a5154737e3eac78a96e5b преди 4cee2b8766045059d5e0b8114837b4a8efe827ac; 473c7dd1d7b59ff8f88a5154737e3eac78a96e5b преди 5424138848eb7d7d8a7196676e90a2cbf2142454; 473c7dd1d7b59ff8f88a5154737e3eac78a96e5b преди 3970a19a80de530b801b6256354d4a529a9a2d6c; 473c7dd1d7b59ff8f88a5154737e3eac78a96e5b преди 8aadc136d8e8d8fc95d7982d213cfe2234dfcf2b; 473c7dd1d7b59ff8f88a5154737e3eac78a96e5b преди 151f8cf5b23d8a534d884432a82a6d54d5a61989; 473c7dd1d7b59ff8f88a5154737e3eac78a96e5b преди 13bf9879b778b2f4b260b45bed18f31806120d1e; 473c7dd1d7b59ff8f88a5154737e3eac78a96e5b преди ebbcbe5c0db215feecc17def06178da443f4eea6; 473c7dd1d7b59ff8f88a5154737e3eac78a96e5b преди 7d54894a1ee265a72d70f7cae1da6cc774cccc71; 3479b3c35e82ed10aa0ca2ee9e78c4eded06ba62; c01ddaa54d7411e964ffd250c018d8469c5852f2; 9e69c673fe077b8dc491cd8406c9bdcb1f76dee2; e48e7e27e4dfd00c81e0381e7cee610cce021452; 4.4.185 преди 4.5; 4.9.185 преди 4.10; 4.14.132 преди 4.15; 4.19.57 преди 4.20
  • Linux Linux: 4.20; преди 4.20; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-72491: Linux | freedomonline.bg