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CVE-2025-68809: Linux

9.1

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, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ksmbd: vfs: fix race on m_flags in vfs_cache ksmbd maintains delete-on-close and pending-delete state in ksmbd_inode->m_flags. In vfs_cache.c this field is accessed under inconsistent locking: some paths read and modify m_flags under ci->m_lock while others do so without taking the lock at all. Examples: - ksmbd_query_inode_status() and __ksmbd_inode_close() use ci->m_lock when checking or updating m_flags. - ksmbd_inode_pending_delete(), ksmbd_set_inode_pending_delete(), ksmbd_clear_inode_pending_delete() and ksmbd_fd_set_delete_on_close() used to read and modify m_flags without ci->m_lock. This creates a potential data race on m_flags when multiple threads open, close and delete the same file concurrently. In the worst case delete-on-close and pending-delete bits can be lost or observed in an inconsistent state, leading to confusing delete semantics (files that stay on disk after delete-on-close, or files that disappear while still in use). Fix it by: - Making ksmbd_query_inode_status() look at m_flags under ci->m_lock after dropping inode_hash_lock. - Adding ci->m_lock protection to all helpers that read or modify m_flags (ksmbd_inode_pending_delete(), ksmbd_set_inode_pending_delete(), ksmbd_clear_inode_pending_delete(), ksmbd_fd_set_delete_on_close()). - Keeping the existing ci->m_lock protection in __ksmbd_inode_close(), and moving the actual unlink/xattr removal outside the lock. This unifies the locking around m_flags and removes the data race while preserving the existing delete-on-close behaviour.

    Засегнати продукти

    • Linux Linux: f44158485826c076335d6860d35872271a83791d преди a4fd1fdf505facfae26b5654c9eff321f4cbc1a7; f44158485826c076335d6860d35872271a83791d преди 5adad9727a815c26013b0d41cfee92ffa7d4037c; f44158485826c076335d6860d35872271a83791d преди ccc78781041589ea383e61d5d7a1e9a31b210b93; f44158485826c076335d6860d35872271a83791d преди ee63729760f5b61a66f345c54dc4c7514e62383d; f44158485826c076335d6860d35872271a83791d преди 991f8a79db99b14c48d20d2052c82d65b9186cad
    • Linux Linux: 5.15; преди 5.15; 6.1.191 до 6.1.*; 6.6.120 до 6.6.*; 6.12.64 до 6.12.*; 6.18.3 до 6.18.*; от 6.19 нататък

    История

    • 13 януари 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2025-68809: Linux | freedomonline.bg