Improper locking in Linux kernel s390 crypto driver



| Updated: 2025-05-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2024-38661
CWE-ID CWE-667
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper locking

EUVDB-ID: #VU93333

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-38661

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the hex2bitmap() function in drivers/s390/crypto/ap_bus.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.19 - 6.6.33

CPE2.3 External links

https://git.kernel.org/stable/c/2062e3f1f2374102f8014d7ca286b9aa527bd558
https://git.kernel.org/stable/c/7c72af16abf2ec7520407098360bbba312289e05
https://git.kernel.org/stable/c/7360cef95aa1ea2b5efb7b5e2ed32e941664e1f0
https://git.kernel.org/stable/c/67011123453b91ec03671d40712fa213e94a01b9
https://git.kernel.org/stable/c/8c5f5911c1b13170d3404eb992c6a0deaa8d81ad
https://git.kernel.org/stable/c/4c0bfb4e867c1ec6616a5049bd3618021e127056
https://git.kernel.org/stable/c/7dabe54a016defe11bb2a278cd9f1ff6db3feba6
https://git.kernel.org/stable/c/d4f9d5a99a3fd1b1c691b7a1a6f8f3f25f4116c9
https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.316
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.219
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.161
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.278
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.94
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.10
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.34


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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