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CVE-2026-98239: Linux

8.1

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, при специфични условия, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: net: lan743x: fix RX checksum use-after-free lan743x_rx_process_buffer() adds each non-first receive buffer to the head skb's frag_list. On the last descriptor, lan743x_rx_trim_skb() linearizes the head and frees the fragment skb metadata. The checksum-success path then writes ip_summed through the local skb pointer, which still points to the final fragment. This causes a use-after-free write when a packet spans more than one receive buffer. Set ip_summed on the surviving head skb instead. Multi-buffer receive can occur after a live MTU increase because existing ring entries keep their old buffer size until they are replenished. A KUnit test invoking lan743x_rx_process_buffer() with a two-buffer packet produced a one-byte KASAN use-after-free write before this change. The same test passed after the change. The driver object also builds with W=1. This was not tested on physical LAN743x hardware.

    Засегнати продукти

    • Linux Linux: cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a преди 0e52886c4324c9897c2c62f92be3dc8316cee67e; cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a преди a58024835c704419bb46d2a34e5223f65605f958; cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a преди 6fe5c3a2503983abb431d93faeadfc7f5e6a7e33; cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a преди 5c216bfa9fb7b36804485e67975e9c98055b31ef; cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a преди 161a403c8625e152de03d1da22bbf9cda6dc9f9f; cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a преди a9ce4053dc945c5372dedba5017ee675b30dc0c5
    • Linux Linux: 6.1; преди 6.1; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.112 до 6.12.*; 6.18.54 до 6.18.*; 7.2.8 до 7.2.*; 7.3 до *

    История

    • 6 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98239: Linux | freedomonline.bg