Unscored severity · published Oct 23, 2026
CVE-2026-98921
ovl: fix UAF in ovl_do_mkdir() debug print
–
CVSS
0.2%
EPSS
No
On KEV
Description
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
fe497f0759e0efb949f9480911d00b6045c21f50 before 719bd33ab359c539a68a278c15a97deb77565cdb; fe497f0759e0efb949f9480911d00b6045c21f50 before ae146bc1abdeb4607abf2975b858c053024e8ac1; 6.19 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98921
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-98921
git.kernel.org
https://git.kernel.org/stable/c/719bd33ab359c539a68a278c15a97deb77565cdb
git.kernel.org
https://git.kernel.org/stable/c/ae146bc1abdeb4607abf2975b858c053024e8ac1
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