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CVE-2026-93105: Linux

7.8

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 локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: esp: do not unref managed frag pages in esp_ssg_unref() esp_ssg_unref() releases the page references held on the source scatterlist after the AEAD operation completes. It calls skb_page_unref() on every frag page for an out-of-place transform (req->src != req->dst), and in the error path of esp_output_tail() (already_unref == true) on the request's own scatterlist. This is wrong when the skb carries managed frags (SKBFL_MANAGED_FRAG_REFS). Managed frags are owned by a zerocopy ubuf and the skb does not hold a per-frag page reference; io_uring SEND_ZC with a registered buffer attaches the bvec pages this way via io_sg_from_iter(). The rest of the stack honours this invariant: skb_release_data() skips the per-frag unref when SKBFL_MANAGED_FRAG_REFS is set, and skb_zcopy_managed() is the guard used at the other unref sites. esp_ssg_unref() is missing that guard, so for a managed-frag skb it drops a page reference the skb never acquired. This can underflow the page reference count and free a page that is still in use. Guard the function with skb_zcopy_managed() so both unref paths are skipped for managed-frag skbs, matching skb_release_data().

    Засегнати продукти

    • Linux Linux: cac2661c53f35cbe651bef9b07026a5a05ab8ce0 преди cb375965800d474c0281a2e92c43c724fce9f463; cac2661c53f35cbe651bef9b07026a5a05ab8ce0 преди 201bdf10ae92e7cbd524adf8c0323e2a963d5fd7; cac2661c53f35cbe651bef9b07026a5a05ab8ce0 преди 3ec55f0c8a6a543cf660584d1346e11f6311ee59; cac2661c53f35cbe651bef9b07026a5a05ab8ce0 преди 1ad6456898f6e6cf58be83bdb607acb1119a9cd1; cac2661c53f35cbe651bef9b07026a5a05ab8ce0 преди 26b6b14c7a0368e317a1e9fb5144ebe6f8d495cf; cac2661c53f35cbe651bef9b07026a5a05ab8ce0 преди 21697720ff43b8dfa25b8e8d9ca7f56f4597fc80
    • Linux Linux: 4.11; преди 4.11; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.57 до 6.18.*; 7.2.6 до 7.2.*; от 7.3 нататък

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-93105: Linux | freedomonline.bg