CVE-2025-39754
Full vulnerability record from the local CVENow database.
Description
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().
Severity
MEDIUM
CVSS score
4.7
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-11 17:15:39.200000
Last modified
2026-10-30 13:18:09.250000
View original CVE JSON
{
"id": "CVE-2025-39754",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-09-11T17:15:39.200",
"lastModified": "2026-10-30T13:18:09.250",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/smaps: fix race between smaps_hugetlb_range and migration\n\nsmaps_hugetlb_range() handles the pte without holdling ptl, and may be\nconcurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). \nThe race is as follows.\n\nsmaps_hugetlb_range migrate_pages\n huge_ptep_get\n remove_migration_ptes\n\t\t\t\t folio_unlock\n pfn_swap_entry_folio\n BUG_ON\n\nTo fix it, hold ptl lock in smaps_hugetlb_range()."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmm/smaps: corrección de una condición de carrera entre smaps_hugetlb_range y migration\n\nsmaps_hugetlb_range() maneja el pte sin mantener ptl, y puede ser concurrente con migration, lo que lleva a un BUG_ON en pfn_swap_entry_to_page(). La condición de carrera es la siguiente.\n\nsmaps_hugetlb_range migrate_pages\n huge_ptep_get\n remove_migration_ptes\n\t\t\t\t folio_unlock\n pfn_swap_entry_folio\n BUG_ON\n\nPara solucionarlo, mantener el bloqueo ptl en smaps_hugetlb_range()."
}
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"attackVector": "LOCAL",
"attackComplexity": "HIGH",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
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"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
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"source": "[email protected]",
"type": "Primary",
"description": [
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