Medium 4.7Published Sep 11, 2025

CVE-2025-39754mm/smaps: fix race between smaps_hugetlb_range and migration

Updated under an hour ago (Oct 26, 2026, 1:50 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: mm/smaps: fix race between smaps_hugetlb_range and migration smaps_hugetlb_range() handles the pte without holdling ptl, and may be concurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). The race is as follows. smaps_hugetlb_range migrate_pages huge_ptep_get remove_migration_ptes folio_unlock pfn_swap_entry_folio BUG_ON To fix it, hold ptl lock in smaps_hugetlb_range().

CVSS: 4.7 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/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: Modified
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 25ee01a2fca02dfb5a3ce316e77910c468108199 before f76089018b34dbe0c2e9b67c5b7d8860668748bb; 25ee01a2fca02dfb5a3ce316e77910c468108199 builds before 2a1f3663974162b8f1e098196f557cfc1d160138; 25ee01a2fca02dfb5a3ce316e77910c468108199 builds before 09fc018f48871123ad5dbd7b03c956580232ed76; from 25ee01a2fca02dfb5a3ce316e77910c468108199 before b625883ccbcc2b57808db51d1375b1d7b9bcb3e5; from 25ee01a2fca02dfb5a3ce316e77910c468108199 before 45d19b4b6c2d422771c29b83462d84afcbb33f01	CNA record
linux linux_kernel linux:linux_kernel	from 4.4 before 6.12.43; from 6.13 before 6.15.11; from 6.16 before 6.16.2; 6.17	NVD

References

References

https://git.kernel.org/stable/c/f76089018b34dbe0c2e9b67c5b7d8860668748bb
https://git.kernel.org/stable/c/2a1f3663974162b8f1e098196f557cfc1d160138	patch
https://git.kernel.org/stable/c/09fc018f48871123ad5dbd7b03c956580232ed76	patch
https://git.kernel.org/stable/c/b625883ccbcc2b57808db51d1375b1d7b9bcb3e5	patch
https://git.kernel.org/stable/c/45d19b4b6c2d422771c29b83462d84afcbb33f01	patch

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.