SB20240531394 - Memory leak in Linux kernel s390 crypto driver
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531394
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-2021-46968)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the zcrypt_queue_unregister() function in drivers/s390/crypto/zcrypt_queue.c, within the zcrypt_card_unregister() function in drivers/s390/crypto/zcrypt_card.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/026499a9c2e002e621ad568d1378324ae97e5524
- https://git.kernel.org/stable/c/055a063a18bcd19b93709e3eac8078d6b2f04599
- https://git.kernel.org/stable/c/971dc8706cee47393d393905d294ea47e39503d3
- https://git.kernel.org/stable/c/70fac8088cfad9f3b379c9082832b4d7532c16c2
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.36
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.20
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13