ovl: fix UAF in ovl_do_mkdir() debug print

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98921
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-23 13:17:12 UTC
Updated2026-10-23 13:17:12 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected fe497f0759e0efb949f9480911d00b6045c21f50 719bd33ab359c539a68a278c15a97deb77565cdb git Not specified
CNA Linux Linux affected fe497f0759e0efb949f9480911d00b6045c21f50 ae146bc1abdeb4607abf2975b858c053024e8ac1 git Not specified
CNA Linux Linux affected 6.19 Not specified
CNA Linux Linux unaffected 6.19 semver Not specified
CNA Linux Linux unaffected 7.2.9 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ae146bc1abdeb4607abf2975b858c053024e8ac1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/719bd33ab359c539a68a278c15a97deb77565cdb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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