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CVE-2026-98549: Linux

9.1

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.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: tcp: prevent collapsing skbs across boundary in rtx queue tcp_write_collapse_fence() sets TCP_SKB_CB(skb)->eor = 1 on tcp_write_queue_tail(sk) to prevent skbs queued after a switch to device encryption from being collapsed into earlier skbs. The fence is a no-op if all earlier data has already been transmitted when the switch happens: sk->sk_write_queue is empty. The not yet acknowledged earlier skbs wait in sk->tcp_rtx_queue with eor 0. On a subsequent retransmit or SACK shift, tcp_retrans_try_collapse() or tcp_shift_skb_data() can then merge an skb queued after the switch into one queued before it. Both users of the fence are affected: - psp: devices only encrypt skbs with skb->decrypted set. The merged skb keeps decrypted = 0 from the earlier skb, so merged data sent after psp_sock_assoc_set_tx() is retransmitted in cleartext. - tls device offload: the merged skb straddles the start marker set in tls_set_device_offload(). The software fallback (fill_sg_in() returns -EINVAL) and the mlx5, nfp and funeth drivers cannot handle such an skb and drop it. Every retransmit rebuilds the same skb, so the connection stalls. Fix this in two places, for defense in depth: 1. Fall back to tcp_rtx_queue_tail(sk) in tcp_write_collapse_fence() when tcp_write_queue_tail(sk) is NULL. 2. Check !skb_cmp_decrypted(to, from) in tcp_skb_can_collapse(), as tcp_skb_can_collapse_rx() does on receive. skb_shift(), which both collapse paths call, already has a DEBUG_NET_WARN_ON_ONCE() for this condition.

    Засегнати продукти

    • Linux Linux: e8f69799810c32dd40c6724d829eccc70baad07f преди bf785a303e5faad16439c563826a07cb811856c8; e8f69799810c32dd40c6724d829eccc70baad07f преди 7061aafc680e14e22b191f178b768886475f8524; e8f69799810c32dd40c6724d829eccc70baad07f преди 533344a00ad968181e60d0980c076a9d0de57482; e8f69799810c32dd40c6724d829eccc70baad07f преди 9e2a2f98e8c0197108c6d97a1fa43bfd89071c30; e8f69799810c32dd40c6724d829eccc70baad07f преди 1ae7aee395245874d797890380d9192bd858fb7e; e8f69799810c32dd40c6724d829eccc70baad07f преди 7ba87509c54cd519e7ed362e0c85e8431f066a18; e8f69799810c32dd40c6724d829eccc70baad07f преди 08e835f5ec6e261c79d8c39f8618b3af29e3b0da; e8f69799810c32dd40c6724d829eccc70baad07f преди fc6d80eb504458d6416b75a94188b268c95c6533
    • Linux Linux: 4.18; преди 4.18; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.112 до 6.12.*; 6.18.55 до 6.18.*; 7.2.9 до 7.2.*; 7.3 до *

    История

    • 18 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98549: Linux | freedomonline.bg