- Vulnerability/
- CVE-2025-37863
CVE-2025-37863: ovl: don't allow datadir only
First published: Fri May 09 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: ovl: don't allow datadir only In theory overlayfs could support upper layer directly referring to a data layer, but there's no current use case for this. Originally, when data-only layers were introduced, this wasn't allowed, only introduced by the "datadir+" feature, but without actually handling this case, resulting in an Oops. Fix by disallowing datadir without lowerdir.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-37863?
The severity of CVE-2025-37863 is classified as medium.
How do I fix CVE-2025-37863?
To fix CVE-2025-37863, update your Linux kernel to the latest patched version.
What does CVE-2025-37863 affect?
CVE-2025-37863 affects the Linux kernel's handling of overlayfs.
Is CVE-2025-37863 exploitable?
Yes, CVE-2025-37863 may be exploitable under certain conditions, specifically with improperly configured overlays.
What versions of the Linux kernel are impacted by CVE-2025-37863?
CVE-2025-37863 impacts multiple versions of the Linux kernel that utilize overlayfs without proper configuration.
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