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CVE-2025-68263: 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: ksmbd: ipc: fix use-after-free in ipc_msg_send_request ipc_msg_send_request() waits for a generic netlink reply using an ipc_msg_table_entry on the stack. The generic netlink handler (handle_generic_event()/handle_response()) fills entry->response under ipc_msg_table_lock, but ipc_msg_send_request() used to validate and free entry->response without holding the same lock. Under high concurrency this allows a race where handle_response() is copying data into entry->response while ipc_msg_send_request() has just freed it, leading to a slab-use-after-free reported by KASAN in handle_generic_event(): BUG: KASAN: slab-use-after-free in handle_generic_event+0x3c4/0x5f0 [ksmbd] Write of size 12 at addr ffff888198ee6e20 by task pool/109349 ... Freed by task: kvfree ipc_msg_send_request [ksmbd] ksmbd_rpc_open -> ksmbd_session_rpc_open [ksmbd] Fix by: - Taking ipc_msg_table_lock in ipc_msg_send_request() while validating entry->response, freeing it when invalid, and removing the entry from ipc_msg_table. - Returning the final entry->response pointer to the caller only after the hash entry is removed under the lock. - Returning NULL in the error path, preserving the original API semantics. This makes all accesses to entry->response consistent with handle_response(), which already updates and fills the response buffer under ipc_msg_table_lock, and closes the race that allowed the UAF.

Засегнати продукти

  • Linux Linux: 0626e6641f6b467447c81dd7678a69c66f7746cf преди de85fb58f9967ba024bb08e0041613d37b57b4d1; 0626e6641f6b467447c81dd7678a69c66f7746cf преди 708a620b471a14466f1f52c90bf3f65ebdb31460; 0626e6641f6b467447c81dd7678a69c66f7746cf преди 5ac763713a1ef8f9a8bda1dbd81f0318d67baa4e; 0626e6641f6b467447c81dd7678a69c66f7746cf преди 759c8c30cfa8706c518e56f67971b1f0932f4b9b; 0626e6641f6b467447c81dd7678a69c66f7746cf преди 8229c6ca50cea701e25a7ee25f48441b582ec5fa; 0626e6641f6b467447c81dd7678a69c66f7746cf преди 1fab1fa091f5aa97265648b53ea031deedd26235
  • Linux Linux: 5.15; преди 5.15; 6.1.160 до 6.1.*; 6.6.120 до 6.6.*; 6.12.62 до 6.12.*; 6.17.12 до 6.17.*; 6.18.1 до 6.18.*; от 6.19 нататък

История

  • 16 декември 2025 Публикувано

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