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CVE-2026-89494: 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: ocfs2: validate lengths in dlm_mig_lockres_handler A node receiving a DLM_MIG_LOCKRES message trusts several fields of the peer-supplied dlm_migratable_lockres without validation. num_locks and lockname_len are bounded only on the sending side, and the message is never checked to actually carry num_locks migratable_lock entries. As a result dlm_process_recovery_data() walks mres->ml[0..num_locks) past the kmalloc(data_len) copy of the message (an out-of-bounds read that ends in a BUG_ON panic), and dlm_init_lockres() copies lockname_len bytes into the fixed 32-byte o2dlm_lockname slab object (a heap out-of-bounds write). Both are reachable by any node in the domain. Validate these fields right after dlm_grab(), before anything uses them -- including the not-joined error path, which already prints mres->lockname with the unbounded lockname_len as a %.*s precision. Reject the message unless lockname_len <= DLM_LOCKID_NAME_MAX, num_locks <= DLM_MAX_MIGRATABLE_LOCKS (the bound the sender already asserts), and the payload is large enough to hold the claimed locks. Conforming recovery and migration messages are unaffected.

    Засегнати продукти

    • Linux Linux: 6714d8e86bf443f6f7af50f9d432025649f091f5 преди 4a5798253212093b9ff7d90c6cfbe348bcda1594; 6714d8e86bf443f6f7af50f9d432025649f091f5 преди dce05b17db862f47ff60614017abe639b2e71cad; 6714d8e86bf443f6f7af50f9d432025649f091f5 преди 0e999d56917f861f97adb961617b1828c9eb4733; 6714d8e86bf443f6f7af50f9d432025649f091f5 преди 77686fa5bba135252d348e2dacf481fc19f60c41; 6714d8e86bf443f6f7af50f9d432025649f091f5 преди f33041906885f96e190cde54e61ddc69de39e3ee; 6714d8e86bf443f6f7af50f9d432025649f091f5 преди 50c4cc9183e11f83427efbf770f54851f4471c02; 6714d8e86bf443f6f7af50f9d432025649f091f5 преди a8facb1670b4a0612183198e758d9539ef628ed9; 6714d8e86bf443f6f7af50f9d432025649f091f5 преди b54e03d9b3697d25f4a0063cf717d459c5e3ad94
    • Linux Linux: 2.6.16; преди 2.6.16; 5.10.270 до 5.10.*; 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.*; 7.3 до *

    История

    • 11 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89494: Linux | freedomonline.bg