CVE-2025-68293

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel’s memory management subsystem, specifically within the huge memory handling related to folio splitting. A NULL pointer dereference can occur when splitting a folio, particularly in scenarios involving shared memory folios in the swap cache or truncated folios. This issue was introduced by commit c010d47f107f, which added a check on the folio’s order via mapping->flags before proceeding with the split. The check fails to account for cases where the mapping pointer is NULL, leading to a crash when attempting to access mapping->flags.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.