Към съдържанието
Търсене

CVE-2026-93239: Linux

Няма оценка

CVSS

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: arm64: mm: Fix the lockless page-table walk in show_pte() show_pte() walks page tables locklessly and can run with interrupts enabled. A concurrent teardown can free a table page while it is being walked. It can also clear a parent entry after show_pte() checked it; the regular pXd_offset() helpers then reread the cleared entry and can derive a bogus lower-level pointer and fault again. Use the lockless offset helpers with the saved parent entries, as gup_fast() does, and pass the saved PMD to pte_offset_map(). For task page tables, arm64 selects MMU_GATHER_RCU_TABLE_FREE. Disable local interrupts around the walk to hold off RCU-deferred table frees and block the tlb_remove_table_sync_one() IPI until the walk is finished. Place the IRQ guard after the header print. This does not make the output a consistent snapshot, but prevents the task page-table walk from dereferencing a released table page or deriving a pointer from a different parent value.

    Засегнати продукти

    • Linux Linux: 1d18c47c735e8adfe531fc41fae31e98f86b68fe преди b8f06b73ad146d84a33c124563c93eeef4f5b674; 1d18c47c735e8adfe531fc41fae31e98f86b68fe преди b3535b6cb2c48f97b8c3378eb9ea12538425bf14; 1d18c47c735e8adfe531fc41fae31e98f86b68fe преди e1b06278a7e241da0cd3187871e67255f956d184; 1d18c47c735e8adfe531fc41fae31e98f86b68fe преди 08d931a0a850ad16a64f2cd23a19f40795cdbdf7; 1d18c47c735e8adfe531fc41fae31e98f86b68fe преди b28fe65a36b8209b6adcf2722c7ce974cf9ac8d1; 1d18c47c735e8adfe531fc41fae31e98f86b68fe преди 68cbd70795dd8c06e7ccdc4eb0b74c5b180076c3; 1d18c47c735e8adfe531fc41fae31e98f86b68fe преди 0f05d95b99164a9ccc4cf4a4920e0ff0228138ad; 1d18c47c735e8adfe531fc41fae31e98f86b68fe преди a77644d009dece1104b6fcc6e322b0e4503db0d6
    • Linux Linux: 3.7; преди 3.7; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; от 7.3 нататък

    История

    • 24 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-93239: Linux | freedomonline.bg