CVE-2024-56544

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 memory allocation in udmabuf. When PAGE SIZE is 4096 and MAX PAGE ORDER is 10 on a 64-bit machine, page alloc only supports 4MB. If the size limit is changed to 3072 (3GB) and then 3GB is allocated, udmabuf creation will fail. The issue is due to kmalloc's maximum allocation size and fragmentation. The patch changes udmabuf's array to use kvmalloc array, which can guarantee allocation for any size without affecting kmalloc's performance.

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