CVE-2025-39754 — Race Condition in Linux
Severity
4.7MEDIUMNVD
EPSS
0.0%
top 97.60%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedSep 11
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().
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.0 | Impact: 3.6
Affected Packages16 packages
Patches
🔴Vulnerability Details
2GHSA▶
GHSA-fppf-vq4v-6j7g: In the Linux kernel, the following vulnerability has been resolved:
mm/smaps: fix race between smaps_hugetlb_range and migration
smaps_hugetlb_range↗2025-09-11
OSV▶
CVE-2025-39754: In the Linux kernel, the following vulnerability has been resolved: mm/smaps: fix race between smaps_hugetlb_range and migration smaps_hugetlb_range()↗2025-09-11