SB20260814104 - Improper input validation in Linux kernel s390 crypto driver
Published: August 14, 2026
Security Bulletin ID
SB20260814104
CSH 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 vulnerability.
1) Improper input validation (CVE-ID: CVE-2026-68451)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 6.8 [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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper input validation in cca_ecc2protkey() when processing CCA ECC private key requests. A local user can supply a crafted key token with an oversized length field to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/013a4484f061a2b41f052e25c0015203287e63f1
- https://git.kernel.org/stable/c/8fa3e9435a13c335efb63fb4f4e77531a0031159
- https://git.kernel.org/stable/c/a9ae0f6dd45c3ccc1d69363f7aea8af179122730
- https://git.kernel.org/stable/c/dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e
- https://git.kernel.org/stable/c/ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5