CVE-2026-98087
kernel: sched/rt,dl: Skip migrate-disabled tasks when picking a push candidate
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 25, 2026
Updated · October 7, 2026
Description
A flaw was found in the Linux kernel. A local user running real-time tasks can trigger a Denial of Service (DoS) due to improper handling of non-migratable tasks within the task scheduler. When a task is marked to prevent migration between processor cores, the scheduler fails to skip it and repeatedly attempts to balance it across CPU cores. This creates an intensive retry loop that exhausts processor resources, leading to severe workload delays and core starvation.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')