CVE-2026-80718

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

Description An issue exists in the pcpu create chunk() function where the nr pages variable, representing the total contiguous backing allocation, is incorrectly used by pcpu chunk populated() to set the chunk->populated bitmap. Because the size of the chunk->populated bitmap is limited to pcpu unit pages, the function writes beyond the bitmap boundaries when nr units is greater than 1, resulting in a bitmap overflow. Additionally, there is an accounting error affecting the global pcpu nr empty pop pages because pcpu balance free() only iterates up to chunk->nr pages.

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