Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ovl: fix UAF in ovl_do_mkdir() debug print ovl_do_mkdir() prints the input dentry with %pd after vfs_mkdir(). Since commit fe497f0759e0 ("VFS: change vfs_mkdir() to unlock on failure."), vfs_mkdir() calls end_creating() on the input dentry on failure and may replace it on success, so the post-call %pd can use-after-free the dentry when CONFIG_OVERLAY_FS_DEBUG is enabled. Print the dentry before the call and only the result afterward.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected fe497f0759e0efb949f9480911d00b6045c21f50 before 719bd33ab359c539a68a278c15a97deb77565cdb; affected fe497f0759e0efb949f9480911d00b6045c21f50 before ae146bc1abdeb4607abf2975b858c053024e8ac1 |
| Linux / Linux | affected 6.19; unaffected 0 before 6.19; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.