(Feel free to update this bug's summary to be more specific.)
Component Readiness has found a potential regression in the following test:

[sig-node] Sysctls [LinuxOnly] [NodeConformance] should support sysctls [MinimumKubeletVersion:1.21] [Environment:NotInUserNS] [Conformance]

Significant regression detected.
Fishers Exact probability of a regression: 99.99%.
Test pass rate dropped from 100.00% to 89.29%.

Sample (being evaluated) Release: 4.21
Start Time: 2025-12-01T00:00:00Z
End Time: 2025-12-08T16:00:00Z
Success Rate: 89.29%
Successes: 25
Failures: 3
Flakes: 0
Base (historical) Release: 4.20
Start Time: 2025-09-21T00:00:00Z
End Time: 2025-10-21T23:59:59Z
Success Rate: 100.00%
Successes: 106
Failures: 0
Flakes: 0

View the test details report for additional context.

3 fairly time related failures, was something fixed and now resolved?

Filed by: dgoodwin@redhat.com