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CVE-2026-90153: 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, 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: ksmbd: bound smb_check_perm_dacl() ACE walks by DACL size smb_check_perm_dacl() validates that the DACL fits inside the NT security descriptor, but then bounds its two ACE walks by the remaining NTSD length (acl_size) rather than the DACL's declared size (pdacl_size). When pdacl->size is smaller than the trailing NTSD buffer, bytes after the declared DACL boundary - still inside the stored security descriptor - are parsed as ACEs during access checks. A crafted DACL can place an access-granting ACE beyond pdacl->size, and the current code accepts it during SMB2_CREATE access validation, while parse_dacl() and smb_inherit_dacl() stop at pdacl_size. Bound both ACE walks by pdacl_size to match the DACL boundary semantics used elsewhere in the server. Validation: - semantic KUnit harness shows the post-boundary ACE is selected before the fix and rejected (EACCES) after it - linux master (7.2-rc6), x86_64

    Засегнати продукти

    • Linux Linux: 8f0541186e9ad1b62accc9519cc2b7a7240272a7 преди 930dcdd888eabf166589e020dcbf6d15b5e13305; 8f0541186e9ad1b62accc9519cc2b7a7240272a7 преди a2051ffe452afad52f580b85a3fd8851933b1e7c; 8f0541186e9ad1b62accc9519cc2b7a7240272a7 преди a29f57a14c939586d84d7fd6a029bd1fd170098f; 8f0541186e9ad1b62accc9519cc2b7a7240272a7 преди a4a307d149327dad5fb25187e1b03cebd1b04de6; 8f0541186e9ad1b62accc9519cc2b7a7240272a7 преди 8e4f75e979c1d9a51b0a48ac33d0cfd5f039ec67; 8f0541186e9ad1b62accc9519cc2b7a7240272a7 преди 79decd88dd3f0d42e7fb0689b1a7853bfa302459; cb69d4d6f709f87c94afa28ae64c501576692171; 6e8f4abf584253cbaa596ea4ad13110cf61cd4c9; 8e33102309bd6839b2e2e158f93a7b378cb4655d; 5.15.62 преди 5.16; 5.18.18 преди 5.19; 5.19.2 преди 5.20
    • Linux Linux: 6.0; преди 6.0; 6.1.191 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; 7.3 до *

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90153: Linux | freedomonline.bg