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CVE-2026-97557: Linux

7.5

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: smb: client: avoid leaking refcount in cifs_queue_oplock_break() cifs_queue_oplock_break() unconditionally takes a reference on the target file before queueing cifs_oplock_break(). Only that work item decreases the reference counter again. If another oplock break arrives while that work is still queued, queue_work() will return false and not queue this second work item. As a result, we will never reach the point to drop the file reference again and are leaking this reference. This can be triggered when interacting with a slow-responding server. As a result, later unmount operations for this file system will fail with BUG: Dentry ... still in use (1) [unmount of cifs cifs] VFS: Busy inodes after unmount of cifs (cifs) kernel BUG at fs/super.c:777! Fix this by only incrementing the reference count if the work has been queued successfully. Taking it after queue_work() is safe because all three callers hold tcon->open_file_lock across the call and _cifsFileInfo_put() decrements under that same lock, so a worker that starts the handler in the window cannot drop the reference before it has been taken.

    Засегнати продукти

    • Linux Linux: b98749cac4a695f084a5ff076f4510b23e353ecd преди 13b9519b19e6e58a6cd01e63062cd1da7bd6449a; b98749cac4a695f084a5ff076f4510b23e353ecd преди 0fb92ac85db58945ad7b970ff17674001487b3a3; b98749cac4a695f084a5ff076f4510b23e353ecd преди 735a3a610136ae10f381d0909dff38e5b5c5f056; b98749cac4a695f084a5ff076f4510b23e353ecd преди de2a6bcff2659bea40c7485115b57f0ae189fc01; b98749cac4a695f084a5ff076f4510b23e353ecd преди af0193bbf1ac8c0f67f972998b0cc629d6116cf6; b98749cac4a695f084a5ff076f4510b23e353ecd преди 2ed2c29dd9593637cfa25ac1eb23241b20202778; b98749cac4a695f084a5ff076f4510b23e353ecd преди dfe7b750c7e069873a8a57a11c816831a235618a; b98749cac4a695f084a5ff076f4510b23e353ecd преди 9f2e63f1b2d5fc5b5423424902c091123e220e7e; 2429fcf06d3cb962693868ab0a927c9038f12a2d; 1ee4f2d7cdcd4508cc3cbe3b2622d7177b89da12; 53fc31a4853e30d6e8f142b824f724da27ff3e40; 8092ecc306d81186a64cda42411121f4d35aaff4; ebac4d0adf68f8962bd82fcf483936edd6ec095b; 3.16.72 преди 3.17; 4.9.171 преди 4.10; 4.14.114 преди 4.15; 4.19.37 преди 4.20; 5.0.10 преди 5.1
    • Linux Linux: 5.1; преди 5.1; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.111 до 6.12.*; 6.18.53 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-2026-97557: Linux | freedomonline.bg