SB20260424233 - Sensitive Information in Resource Not Removed Before Reuse in Linux kernel s390 kernel
Published: April 24, 2026
Security Bulletin ID
SB20260424233
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Sensitive Information in Resource Not Removed Before Reuse (CVE-ID: CVE-2026-31482)
CWE-ID: CWE-226 - Sensitive Information in Resource Not Removed Before Reuse
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to improper clearing of sensitive information in s390 kernel entry handlers when handling kernel entry. A local user can observe residual register contents to disclose sensitive information.
The issue affects the r12 register on s390 systems.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0738d395aab8fae3b5a3ad3fc640630c91693c27
- https://git.kernel.org/stable/c/7f4e3233faa8470dd0627bc49b2809f2bfebd909
- https://git.kernel.org/stable/c/95c899cd791803a5bf7b73e5994fbbe1cc1a9c36
- https://git.kernel.org/stable/c/99a8b420f3f0e162eb9c9c9253929d4d23f9bd30
- https://git.kernel.org/stable/c/a58d298a83a3a9b7ca99ded9d60a1e77231159ef