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CVE-2026-97554: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: smb: client: avoid using uninitialized SIDs in cifs_posix_to_fattr() cifs_posix_to_fattr() ignores the return value of posix_info_parse(). When a malformed POSIX directory entry is encountered (e.g. invalid SID lengths from an untrusted server), posix_info_parse() returns -1 without populating the 'parsed' struct. The uninitialized stack memory in parsed.owner and parsed.group is then passed to sid_to_id(), which processes the garbage bytes and passes them to request_key() to construct a SID string, potentially leaking kernel stack contents to the userspace idmap daemon. Fix this by checking the return value and skipping the SID-to-id mapping when parsing fails. The remaining fattr fields (timestamps, mode, etc.) are populated directly from the 'info' pointer so they are unaffected.

    Засегнати продукти

    • Linux Linux: 9934430e2178d5164eb1ac91a9b092f9e7e64745 преди 1915b69e36906968e2b698699d0f219875ae846e; 9934430e2178d5164eb1ac91a9b092f9e7e64745 преди 604feb3e8141bf11f5afd48d36d401fee5af9536; 9934430e2178d5164eb1ac91a9b092f9e7e64745 преди 33106019c3be57b5fc6411cfaad6d98214a51265; 9934430e2178d5164eb1ac91a9b092f9e7e64745 преди 2be31f252ade791b84f7164991f14436aed1d4b9; 9934430e2178d5164eb1ac91a9b092f9e7e64745 преди c9a8b60ce140a68d172452f418137fc7ddbae7db; 9934430e2178d5164eb1ac91a9b092f9e7e64745 преди da6e25842431982d5a53cf00d925b98c690f4467; dd80b98bdf0a4b3206739f3513b0518f27a7b4ef; d8e39c11f66125f49de55537a6efc8ecadf4a0f7; 5.8.17 преди 5.9; 5.9.2 преди 5.10
    • Linux Linux: 5.10; преди 5.10; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.57 до 6.18.*; 7.2.7 до 7.2.*; от 7.3 нататък

    История

    • 25 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-97554: Linux | freedomonline.bg