Dietmar Eggemann

**Name of the Vulnerable Software and Affected Versions** Linux kernel (affected versions not specified) **Description** A vulnerability in the Linux kernel has been resolved, related to the initialization of topology for core scheduling on Arm64 systems. The issue arises when the `store cpu topology()` function fails to correctly set up the `smt mask`, leading to a mismatch between the actual topology and the core scheduling data structures. This can cause a warning and a crash, particularly when running stress-ng tests that enable core scheduling. The problem occurs because `rq->core` is not correctly set for non-leader CPUs, resulting in a NULL pointer dereference. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.