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CVE-2026-31432: Linux

8.8

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, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix OOB write in QUERY_INFO for compound requests When a compound request such as READ + QUERY_INFO(Security) is received, and the first command (READ) consumes most of the response buffer, ksmbd could write beyond the allocated buffer while building a security descriptor. The root cause was that smb2_get_info_sec() checked buffer space using ppntsd_size from xattr, while build_sec_desc() often synthesized a significantly larger descriptor from POSIX ACLs. This patch introduces smb_acl_sec_desc_scratch_len() to accurately compute the final descriptor size beforehand, performs proper buffer checking with smb2_calc_max_out_buf_len(), and uses exact-sized allocation + iov pinning.

    Засегнати продукти

    • Linux Linux: 9f297df20d93411c0b4ddad7f88ba04a7cd36e77 преди 533f84264e28c54a79257ea87d2f94a0fcc9a611; e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d преди 850452af77f55d185f9445e1f7a1db53c5e4aad4; e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d преди d48c64fb80ad78b3dd29fb7d79b6ec7bd72bfc09; e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d преди 075ea208c648cc2bcd616295b711d3637c61de45; e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d преди 515c2daab46021221bdf406bef19bc90a44ec617; e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d преди fda9522ed6afaec45cabc198d8492270c394c7bc; f2283680a80571ca82d710bc6ecd8f8beac67d63; 6.1.71 преди 6.1.191; 5.15.145 преди 5.16
    • Linux Linux: 6.6; преди 6.6; 6.1.191 до 6.1.*; 6.6.143 до 6.6.*; 6.12.81 до 6.12.*; 6.18.22 до 6.18.*; 6.19.12 до 6.19.*; от 7.0 нататък

    История

    • 22 април 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-31432: Linux | freedomonline.bg