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CVE-2026-89617: 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: fs/ntfs3: validate dirty page table on log replay Each DIR_PAGE_ENTRY ends in a page_lcns[] array whose length is the on-disk lcns_follow field. check_rstbl() validates the table bookkeeping but never checks that this array fits in the entry, so a crafted lcns_follow lets the v0->v1 conversion memmove and later replay passes run off the entry. Add check_dp_table() to reject, right after check_rstbl(), any entry larger than its size claims via struct_size() (the same expression used to allocate these entries, so the check is overflow-safe by construction). All consumers can then trust lcns_follow as the real capacity. This covers every page_lcns[] access whose index is bounded by the entry itself (the conversion memmove, the HotFix store via find_dp(), and the self-bounded scan loops). Accesses whose index comes from the log record need a separate bound and are handled in a follow-up patch.

    Засегнати продукти

    • Linux Linux: b46acd6a6a627d876898e1c84d3f84902264b445 преди 0e07ea2fc45a7b4757ef7bf1f692cc0180a08323; b46acd6a6a627d876898e1c84d3f84902264b445 преди 1e90b1703ee1a04cd3e9e399353fc536f5f3ba10; b46acd6a6a627d876898e1c84d3f84902264b445 преди d23155634a4bc1183e761d5eb2c043b2e693cc98; b46acd6a6a627d876898e1c84d3f84902264b445 преди 1200c2779c43b62656ccbb67df9468a7a9af2484; b46acd6a6a627d876898e1c84d3f84902264b445 преди 2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56; b46acd6a6a627d876898e1c84d3f84902264b445 преди 0908da07c23be4f94b99dfd9a94765525f0fe4bd; b46acd6a6a627d876898e1c84d3f84902264b445 преди 006cb7713dec10368e699abc4367e5faa334c9a5
    • Linux Linux: 5.15; преди 5.15; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

    История

    • 11 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89617: Linux | freedomonline.bg