CVE-2026-72172
Last modified
CVE-2026-72172 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.20% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 6fd3620b342861de9547ea01d28f664892ef51a1, < 511a60e71aec308b24722cffc1912bf6befb87bf; >= 6fd3620b342861de9547ea01d28f664892ef51a1, < 11f2826e9ee6f24aaa774e3dcd75abbe4b3091b6; >= 6fd3620b342861de9547ea01d28f664892ef51a1, < da5234df0941665f3a3f5b80f3dab94046537be0; >= 6fd3620b342861de9547ea01d28f664892ef51a1, < b91e27bce37cab9f35de0059278ebe457ca9878b; >= 6fd3620b342861de9547ea01d28f664892ef51a1, < cd681403a87085562499d60325b7b45d3be11217 |
| Linux | Linux | 5.19 |
References
Timeline
- Published
- Last Modified
- Status
- Received
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