UNKNOWN NVD
CVE-2026-98921
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
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.
References
- https://git.kernel.org/stable/c/719bd33ab359c539a68a278c15a97deb77565cdb
- https://git.kernel.org/stable/c/ae146bc1abdeb4607abf2975b858c053024e8ac1
This unknown severity vulnerability was published on 2026-10-23 via NVD.
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