CVE-2025-68211 ksm: use range-walk function to jump over holes in scan_get_next_rmap_item

In the Linux kernel, the following vulnerability has been resolved: ksm: use range-walk function to jump over holes in scangetnextrmapitem Currently, scangetnextrmapitem walks every page address in a VMA to locate mergeable pages. This becomes highly inefficient when scanning large virtual memory...

CVE-2025-68211

In the Linux kernel, the following vulnerability has been resolved: ksm: use range-walk function to jump over holes in scangetnextrmapitem Currently, scangetnextrmapitem walks every page address in a VMA to locate mergeable pages. This becomes highly inefficient when scanning large virtual memory...

CVE-2025-68211

CVE-2025-68211 (Linux kernel, KSM) is addressed by a patch that changes scan_get_next_rmap_item from per-address walking to a range walk using walk_page_range, allowing KSMD to skip unmapped holes in large VMAs. The fix targets inefficiency where KSMD would otherwise scan vast address spaces with...

PT-2025-51624

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel’s KSM Kernel Samepage Merging functionality experienced performance issues when scanning large virtual memory areas with mostly unmapped regions. The scan get next rmap...