SB20260928213 - NULL pointer dereference in Linux kernel s390 kernel
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928213
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) NULL pointer dereference (CVE-ID: CVE-2026-97980)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to a missing null pointer check in debug_set_level() when processing an unchecked debug_register() result. A local privileged user can pass an unchecked debug_register() result to debug_set_level() to cause a denial of service.
Remediation
Install update from vendor's website.