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CVE-2026-89480: Linux

7.5

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: nvme-tcp: reject a read that transferred too few bytes nvme_tcp_recv_data() completes a request once the current C2HData PDU has been consumed. Nothing compares the total bytes received against the length the command asked for: struct nvme_tcp_request has no receive-side counter, queue->data_remaining is per queue, and blk_mq_end_request() completes for blk_rq_bytes(rq) unconditionally with no residual concept anywhere above. A controller can therefore answer a 4096-byte read with 512 bytes and have it reported as a complete read; user space then gets 4096 bytes of which 3584 are whatever was already in the page. I reproduced that with a test target. Count the bytes received and refuse to complete a successful read whose count does not match, at the two NVME_TCP_F_DATA_SUCCESS paths and in nvme_tcp_process_nvme_cqe(). The success test shifts req->status right by one, because the driver keeps the wire value there and shifts it on completion, so the check must see what the completion path will see. Only REQ_OP_READ is checked, because there the length comes from the sectors the request covers; a passthrough command is built by its submitter, which picks both command and buffer, so the kernel has nothing to compare against.

Засегнати продукти

  • Linux Linux: 3f2304f8c6d6ed97849057bd16fee99e434ca796 преди b674af31d044a86bd094ba8bb8f2bb92fb49aac5; 3f2304f8c6d6ed97849057bd16fee99e434ca796 преди a5c1bb0fb1bab2f24a081339c145870697f6d220; 3f2304f8c6d6ed97849057bd16fee99e434ca796 преди aa107e3a68f4af177d60f2d87679e7f67179a36c; 3f2304f8c6d6ed97849057bd16fee99e434ca796 преди fca3ebb63e5c82561cd9934365dcc0d068008006; 3f2304f8c6d6ed97849057bd16fee99e434ca796 преди 99066cf9bba175f610ceb61a35f6fc9fbc33ff65; 3f2304f8c6d6ed97849057bd16fee99e434ca796 преди 8a02ad98798fd01f51f648c1fdd8f3c9d07195d3; 3f2304f8c6d6ed97849057bd16fee99e434ca796 преди 832a685efeb5d925ee7d30011d2dbe45f81447a3; 3f2304f8c6d6ed97849057bd16fee99e434ca796 преди 7fa3f73f6c8ddc5f0425b50fb2a626a782ef7d12
  • Linux Linux: 5.0; преди 5.0; 5.10.273 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; 7.3 до *

История

  • 11 септември 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-89480: Linux | freedomonline.bg