CVE-2026-72172mm/mm_init: fix uninitialized struct pages for ZONE_DEVICE
Updated under an hour ago ()
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 6fd3620b342861de9547ea01d28f664892ef51a1 before c5ef574d57e4a701485c13f26822328c91f05413; from 6fd3620b342861de9547ea01d28f664892ef51a1 before 511a60e71aec308b24722cffc1912bf6befb87bf; from 6fd3620b342861de9547ea01d28f664892ef51a1 before 11f2826e9ee6f24aaa774e3dcd75abbe4b3091b6; from 6fd3620b342861de9547ea01d28f664892ef51a1 before da5234df0941665f3a3f5b80f3dab94046537be0; from 6fd3620b342861de9547ea01d28f664892ef51a1 before b91e27bce37cab9f35de0059278ebe457ca9878b; from 6fd3620b342861de9547ea01d28f664892ef51a1 before cd681403a87085562499d60325b7b45d3be11217 | CNA record |
References
- https://git.kernel.org/stable/c/c5ef574d57e4a701485c13f26822328c91f05413
- https://git.kernel.org/stable/c/511a60e71aec308b24722cffc1912bf6befb87bf
- https://git.kernel.org/stable/c/11f2826e9ee6f24aaa774e3dcd75abbe4b3091b6
- https://git.kernel.org/stable/c/da5234df0941665f3a3f5b80f3dab94046537be0
- https://git.kernel.org/stable/c/b91e27bce37cab9f35de0059278ebe457ca9878b
- https://git.kernel.org/stable/c/cd681403a87085562499d60325b7b45d3be11217
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.