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CVE-2026-98374: Linux

8.8

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 след действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: tcp: fix use-after-free of retransmit_skb_hint in tcp_send_synack() When tcp_send_synack() replaces the cloned SYN skb at the head of the retransmit queue with a copy, it frees the original with tcp_rtx_queue_unlink_and_free() and only repairs tp->highest_sack. tp->retransmit_skb_hint keeps pointing at the freed skbuff_fclone_cache object. The dangling hint is read in tcp_verify_retransmit_hint() and used as the root of the rbtree walk in tcp_xmit_retransmit_queue(). An unprivileged TFO client (sendmsg(MSG_FASTOPEN)) can arm the hint with an attacker-supplied ICMP fragmentation-needed message, after which a simultaneous open frees the armed SYN skb: BUG: KASAN: slab-use-after-free in tcp_mark_skb_lost (net/ipv4/tcp_input.c:1316) Read of size 4 at addr ffff88800604d928 by task swapper/1/0 Call Trace: tcp_mark_skb_lost (net/ipv4/tcp_input.c:1316) tcp_simple_retransmit (net/ipv4/tcp_input.c:3158) tcp_v4_err (net/ipv4/tcp_ipv4.c:587) Sync the hint to the copy.

    Засегнати продукти

    • Linux Linux: c31b70c9968fe9c4194d1b5d06d07596a3b680de преди fad6d429651e748365e93ca54645accc212f0018; c31b70c9968fe9c4194d1b5d06d07596a3b680de преди c5b4da1f403a658c1c19766be2b426003ada419f; c31b70c9968fe9c4194d1b5d06d07596a3b680de преди 71d45049b0d631dfdbf3c65305f7fca676de023b; c31b70c9968fe9c4194d1b5d06d07596a3b680de преди e3ea71cb1408a013ed4e8a757b815f1a919324bd; c31b70c9968fe9c4194d1b5d06d07596a3b680de преди 631aa4cb45099f09e9385dd786bd291c6270bfc4; c31b70c9968fe9c4194d1b5d06d07596a3b680de преди 0f87720c7e4bcab07c24888b3cf12bfe857bb90e; c31b70c9968fe9c4194d1b5d06d07596a3b680de преди fe99bbeee5c5dbd3abc30721a8079ced59649d97
    • Linux Linux: 5.11; преди 5.11; 5.15.222 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.112 до 6.12.*; 6.18.55 до 6.18.*; 7.2.9 до 7.2.*; от 7.3 нататък

    История

    • 7 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98374: Linux | freedomonline.bg