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CVE-2026-64566: 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.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: propagate SKBFL_SHARED_FRAG in iptfs_skb_add_frags() When iptfs_skb_add_frags() copies frag references from the source frag walk into a new SKB, it increments the page reference count via __skb_frag_ref() but does not propagate SKBFL_SHARED_FRAG to the destination SKB's skb_shinfo->flags. If the source SKB carries shared frags (e.g. from a page-pool backed receive path), the new inner SKB will appear to ESP as having privately owned frags. A subsequent esp_input() call for a nested transport-mode SA then takes the no-COW fast path and decrypts in place, writing over pages that are still referenced by the outer IPTFS SKB. This causes kernel-visible memory corruption and can trigger a panic. All other frag-transfer helpers in the kernel (skb_try_coalesce, skb_gro_receive, __pskb_copy_fclone, skb_shift, skb_segment) correctly propagate SKBFL_SHARED_FRAG; align iptfs_skb_add_frags() with this convention by setting the flag inside the loop immediately after __skb_frag_ref() and nr_frags++, so every exit path that attaches a frag unconditionally propagates SKBFL_SHARED_FRAG.

    Засегнати продукти

    • Linux Linux: 5f2b6a9095743a6bf1f34c43c4fe78fa8bdf5ad7 преди d8aaf06b29f5a0b6186cf68d21c7d63678ee3891; 5f2b6a9095743a6bf1f34c43c4fe78fa8bdf5ad7 преди ffd64e0717efd83fbf3396ab4e5ac6d795dac4d0; 5f2b6a9095743a6bf1f34c43c4fe78fa8bdf5ad7 преди 430ea57d6daf765e88f90046afbfd1e071cb7200
    • Linux Linux: 6.14; преди 6.14; 6.18.42 до 6.18.*; 7.1.6 до 7.1.*; от 7.2 нататък

    История

    • 5 август 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-64566: Linux | freedomonline.bg