SB2025100448 - Memory leak in Linux kernel s390 crypto driver
Published: October 4, 2025 Updated: October 27, 2025
Security Bulletin ID
SB2025100448
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Memory leak (CVE-ID: CVE-2023-53568)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the zcdn_create() function in drivers/s390/crypto/zcrypt_api.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0878052579cb2773caee64812a811edcab6b5a55
- https://git.kernel.org/stable/c/131cd74a8e38d75239f2c81dfee53d6554eb8bf8
- https://git.kernel.org/stable/c/147d8da33a2c2195ec63acd56cd7d80a3458c253
- https://git.kernel.org/stable/c/174f11ef1615ec3ab1e2189685864433c0d855a2
- https://git.kernel.org/stable/c/6252f47b78031979ad919f971dc8468b893488bd
- https://git.kernel.org/stable/c/6b0cb9c055843777b374309503d89eabeb769355
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.257