CVE-2026-46115

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 7.0.11-1.1

Description The biovec phys mergeable() function, used in request merge, DMA mapping, and integrity merge paths, fails to verify if physically contiguous bvec segments belong to different dev pagemaps. When zone device memory is registered in multiple chunks, each chunk is assigned its own dev pagemap. Because bio iov iter get pages() can fill a single bio with bvecs from different pgmaps, biovec phys mergeable() may incorrectly coalesce these segments if they are physically contiguous. This prevents the recovery of the correct pgmap for the merged segment through the page pgmap() function.

Recommendations Update to version 7.0.11-1.1.