Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: cifs: use cifs_invalidate_cache() in cifs_do_truncate() for O_TRUNC cifs_do_truncate() is invoked from cifs_open() without i_rwsem, so it cannot use cifs_resize_file_locked() to perform a proper fscache cookie resize. Instead, add cifs_invalidate_cache() after cifs_setsize(). cifs_invalidate_cache() calls fscache_invalidate(), which works without holding i_rwsem: it unconditionally increments inval_counter and sets FSCACHE_COOKIE_NO_DATA_TO_READ, ensuring that stale cached data is not served once the cookie is later activated by fscache_use_cookie(). Truncation to zero leaves no valid cached data, making invalidation the correct semantic here.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected efbcecdecefc26fa062c0e8210533ccad7d6bd4a before 8b9b10fe5b8b492b27b9f4546742ea541a650213; affected fa724e235cfdb0fb0bb427d0f9dfe864ae27403e before 81fc3868a7f726980ff845c1d0d271051e5f0f45; affected fa724e235cfdb0fb0bb427d0f9dfe864ae27403e before 364b183230586a62660a7280c1eb20138338eeb5; affected 6838bcac954487cc0a3c8a4ee1b3a3a30e244dc9; affected 75640976cf474eb41682a13f2dbe9534ac26ca50; affected 3513f3931c579ba2a715784c6dedc59e0d9282ee; affected 6.18.44 before 6.18.50; affected 6.12.105 before 6.13; affected 7.1.8 before 7.2 |
| Linux / Linux | affected 7.2; unaffected 0 before 7.2; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.