Jiwei Sun

**Name of the Vulnerable Software and Affected Versions** Linux kernel versions prior to 6.6.74 **Description** A memory leak issue has been identified in the Linux kernel, specifically in the sched/numa component, due to the overwritten vma->numab state. This issue can be consistently reproduced on servers with multiple cores when running the hackbench program of LTP. The problem occurs when multiple threads access a shared vma simultaneously, causing vma->numab state to be overwritten. The issue can be resolved by using the cmpxchg atomic operation to ensure that only one thread executes the vma->numab state assignment. **Recommendations** To resolve this issue, update the Linux kernel to version 6.6.74 or later. As a temporary workaround, consider disabling the `task numa work()` function until a patch is available. Restrict access to the vulnerable `vma->numab state` variable to minimize the risk of exploitation. Avoid using the `hackbench` program with the `thread` argument until the issue is resolved.