SB2026050975 - Integer overflow in Linux kernel sched
Published: May 9, 2026
Security Bulletin ID
SB2026050975
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) Integer overflow (CVE-ID: CVE-2026-43323)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 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
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an integer overflow in the CFS scheduler when handling repeated yield operations across runnable tasks. A local user can trigger repeated yield activity to cause a denial of service.
Systems with multiple cgroups may be more exposed because scheduler tick updates may not reach every cgroup in a timely manner.
Remediation
Install update from vendor's website.