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CVE-2025-38527: Linux

9.8

CVSS 3.1

0,4%

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.

  • Експлоатация: няма данни за експлоатация
  • Атаката може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix use-after-free in cifs_oplock_break A race condition can occur in cifs_oplock_break() leading to a use-after-free of the cinode structure when unmounting: cifs_oplock_break() _cifsFileInfo_put(cfile) cifsFileInfo_put_final() cifs_sb_deactive() [last ref, start releasing sb] kill_sb() kill_anon_super() generic_shutdown_super() evict_inodes() dispose_list() evict() destroy_inode() call_rcu(&inode->i_rcu, i_callback) spin_lock(&cinode->open_file_lock) <- OK [later] i_callback() cifs_free_inode() kmem_cache_free(cinode) spin_unlock(&cinode->open_file_lock) <- UAF cifs_done_oplock_break(cinode) <- UAF The issue occurs when umount has already released its reference to the superblock. When _cifsFileInfo_put() calls cifs_sb_deactive(), this releases the last reference, triggering the immediate cleanup of all inodes under RCU. However, cifs_oplock_break() continues to access the cinode after this point, resulting in use-after-free. Fix this by holding an extra reference to the superblock during the entire oplock break operation. This ensures that the superblock and its inodes remain valid until the oplock break completes.

Засегнати продукти

  • Linux Linux: b98749cac4a695f084a5ff076f4510b23e353ecd преди 4256a483fe58af66a46cbf3dc48ff26e580d3308; b98749cac4a695f084a5ff076f4510b23e353ecd преди 0a4eec84d4d2c4085d4ed8630fd74e4b39033c1b; b98749cac4a695f084a5ff076f4510b23e353ecd преди 2baaf5bbab2ac474c4f92c10fcb3310f824db995; b98749cac4a695f084a5ff076f4510b23e353ecd преди 09bce2138a30ef10d8821c8c3f73a4ab7a5726bc; b98749cac4a695f084a5ff076f4510b23e353ecd преди da11bd4b697b393a207f19a2ed7d382a811a3ddc; b98749cac4a695f084a5ff076f4510b23e353ecd преди 705c79101ccf9edea5a00d761491a03ced314210; 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; 5.15.190 до 5.15.*; 6.1.147 до 6.1.*; 6.6.100 до 6.6.*; 6.12.40 до 6.12.*; 6.15.8 до 6.15.*; от 6.16 нататък

История

  • 16 август 2025 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2025-38527: Linux | freedomonline.bg