Bug 2401507 (CVE-2023-53568)

Summary: CVE-2023-53568 kernel: s390/zcrypt: don't leak memory if dev_set_name() fails
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A resource leak was found in the Linux kernel's s390 cryptographic device driver in the device creation path. When the dev_set_name function fails during creation of a zcrypt device node, the zcdn_create function returns an error without freeing the newly allocated device structure and associated resources. This creates a permanent memory leak, leading to resource exhaustion and denial of service.
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Description OSIDB Bzimport 2025-10-04 16:04:37 UTC 
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.
Comment 1 Alexander B 2025-10-06 14:52:00 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100452-CVE-2023-53568-0020@gregkh/T