Hch

**Name of the Vulnerable Software and Affected Versions** Linux kernel (affected versions not specified) **Description** The Linux kernel contains an issue within the `shrink folio list()` function related to handling hardware-poisoned large folios. Specifically, the function fails to correctly handle large folios that have been marked as hardware-poisoned, potentially leading to a null pointer dereference and a kernel panic during memory reclamation. This occurs when memory reclamation for a large folio races with a memory failure, triggering a bug when `unmap poisoned folio()` attempts to handle the large folio. The issue arises from the inability of `unmap poisoned folio()` to handle large folios directly, and the failure to split the huge page table entry (PMD) before attempting unmapping. While unlikely in typical scenarios, the race condition can lead to system instability. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.