CVE-2026-72172mm/mm_init: fix uninitialized struct pages for ZONE_DEVICE
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 6fd3620b342861de9547ea01d28f664892ef51a1 – < c5ef574d57e4a701485c13f26822328c91f05413
- affected 6fd3620b342861de9547ea01d28f664892ef51a1 – < 511a60e71aec308b24722cffc1912bf6befb87bf
- affected 6fd3620b342861de9547ea01d28f664892ef51a1 – < 11f2826e9ee6f24aaa774e3dcd75abbe4b3091b6
- affected 6fd3620b342861de9547ea01d28f664892ef51a1 – < da5234df0941665f3a3f5b80f3dab94046537be0
- affected 6fd3620b342861de9547ea01d28f664892ef51a1 – < b91e27bce37cab9f35de0059278ebe457ca9878b
- affected 6fd3620b342861de9547ea01d28f664892ef51a1 – < cd681403a87085562499d60325b7b45d3be11217
- affected 5.19
- unaffected < 5.19
- unaffected 6.1.184 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/c5ef574d57e4a701485c13f26822328c91f05413 (opens in a new tab)
- https://git.kernel.org/stable/c/511a60e71aec308b24722cffc1912bf6befb87bf (opens in a new tab)
- https://git.kernel.org/stable/c/11f2826e9ee6f24aaa774e3dcd75abbe4b3091b6 (opens in a new tab)
- https://git.kernel.org/stable/c/da5234df0941665f3a3f5b80f3dab94046537be0 (opens in a new tab)
- https://git.kernel.org/stable/c/b91e27bce37cab9f35de0059278ebe457ca9878b (opens in a new tab)
- https://git.kernel.org/stable/c/cd681403a87085562499d60325b7b45d3be11217 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-58930 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-72172)Record last updated .