SB20261015144 - Unchecked Return Value in Linux kernel s390 crypto
Published: October 15, 2026
Security Bulletin ID
SB20261015144
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Unchecked Return Value (CVE-ID: CVE-2026-98387)
CWE-ID: CWE-252 - Unchecked Return Value
CVSSv4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause access to uninitialized memory.
The vulnerability exists due to unchecked return values in the Linux kernel's s390 AES processing routines when initializing or advancing a scatter-gather cipher walk. A local user can trigger affected AES operations following a walk failure to cause access to uninitialized memory.
Remediation
Install update from vendor's website.