CVE-2026-72172
In the Linux kernel, the following vulnerability has been resolved: mm/mm_init: fix uninitialized struct pages for ZONE_DEVICE If DAX memory is hotplugged into…
Impact
In the Linux kernel, the following vulnerability has been resolved: mm/mm_init: fix uninitialized struct pages for ZONE_DEVICE If DAX memory is hotplugged into an unoccupied subsection of an early section, section_activate() reuses the unoptimized boot memmap. However, compound_nr_pages() still assumes that vmemmap optimization is in effect and initializes only the reduced number of struct pages. As a result, the remaining tail struct pages are left uninitialized, which can later lead to unexpected behavior or crashes. Fix this by treating early sections as unoptimized when calculating how many struct pages to initialize.
Affected packages
This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/11f2826e9ee6f24aaa774e3dcd75abbe4b3091b6
- https://git.kernel.org/stable/c/511a60e71aec308b24722cffc1912bf6befb87bf
- https://git.kernel.org/stable/c/b91e27bce37cab9f35de0059278ebe457ca9878b
- https://git.kernel.org/stable/c/c5ef574d57e4a701485c13f26822328c91f05413
- https://git.kernel.org/stable/c/cd681403a87085562499d60325b7b45d3be11217
- https://git.kernel.org/stable/c/da5234df0941665f3a3f5b80f3dab94046537be0