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CVE-2026-89478: 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: sctp: drop a chunk if its transport was removed sctp_rcv() resolves the transport once per packet and leaves it in chunk->transport. The lookup reference, or the one sctp_add_backlog() takes if the socket is owned by userspace, keeps it around until the chunk has been processed. An authenticated ASCONF DEL-IP can remove it in the meantime. sctp_assoc_rm_peer() takes the transport out of the association and calls sctp_transport_free(), which tags it dead and drops the reference the association held. There is a window on both paths: the packet can sit on the socket backlog, and on the direct path the lookup completes before bh_lock_sock(). The DATA chunk in that packet puts the removed transport back into asoc->peer.last_data_from. Once the packet is done that reference goes away and the transport is freed by RCU, so the next delayed SACK carries the pointer into the SACK chunk and sctp_outq_select_transport() reads the freed transport's state. Drop the chunk in sctp_inq_push(), next to the existing rcvr->dead check. Both paths reach it with the association's socket lock held. The peer retransmits it.

Засегнати продукти

  • Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 3fc072e7cb4a0ff251d13cfc2d24f62489cd9386; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди d7cb5ad832095dc4becfdb2a36007ffd50e49fb0; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 0422b092a3d43ca462932ff9f747731ca078d1d4; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 928fd7920ba37cc5637a211b9be979083413a2fa; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди c6c86a5e62a4fec36692ddd64b9144b660f71f96; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 1035bdef1efb9b1076d1a57b81e08c637ff08ecc; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 3537961df2163258bddc230db0e18dc14e925ea6; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 03a9d10ecf71f54b2af8020935f2033d4a132be5
  • Linux Linux: 2.6.12; преди 2.6.12; 5.10.270 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.*; от 7.3 нататък

История

  • 11 септември 2026 Публикувано

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