CVE-2023-53568 s390/zcrypt: don't leak memory if dev_set_name() fails
A memory leak in the s390/zcrypt driver when dev_set_name() fails can lead to resource exhaustion and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-53568?
CVE-2023-53568 is a medium-severity denial of service vulnerability in Linux kernel, published on 4 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
s390/zcrypt: don't leak memory if dev_set_name() fails
When dev_set_name() fails, zcdn_create() doesn't free the newly allocated resources. Do it.
Weakness: CWE-401
Which versions are affected by CVE-2023-53568?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53568?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-53568 being exploited?
There is no known exploitation of CVE-2023-53568 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-53568, DEBIAN-CVE-2023-53568, GHSA-qwh3-qmrm-hv2r, UBUNTU-CVE-2023-53568.