CVE-2026-53288

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

Description An issue exists in the arm64 architecture early kernel mapping process. For 4K pages, the early kernel mapping may utilize 2MB block entries, but kernel segments are only 64KB aligned. When segment boundaries fall within a 2MB block, a Page Table Entry (PTE) table is required to apply different attributes to each side of the boundary. Due to the separate mapping of [ text, stext) from [ stext, etext), an additional early-only split is created. This can result in the requirement of one more page-table page than the EARLY SEGMENT EXTRA PAGES allowance currently reserves, potentially causing the [data, end) segment to overflow into the gap page before the early init stack.

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