CVE-2025-38686

· MEDIUMAnalyzed

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CVSS v3.1

5.5

EPSS

0.15%

Published

Sep 4, 2025

Modified

Nov 24, 2025

Public PoC / Exploit

All weaponized →

No public PoC or exploit code indexed for this CVE.

Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

Description

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: fix a crash in UFFDIO_MOVE when PMD is a migration entry When UFFDIO_MOVE encounters a migration PMD entry, it proceeds with obtaining a folio and accessing it even though the entry is swp_entry_t. Add the missing check and let split_huge_pmd() handle migration entries. While at it also remove unnecessary folio check. [surenb@google.com: remove extra folio check, per David]

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products (4)

linux · linux_kernel (up to 6.12.43)vulnerable

linux · linux_kernel (up to 6.15.11)vulnerable

linux · linux_kernel (up to 6.16.2)vulnerable

linux · linux_kernelvulnerable

References (4)

https://git.kernel.org/stable/c/1202abad7a7ccd28c426d2844771a387b07629a4

Patch

https://git.kernel.org/stable/c/7f1101a0a181243ad587ececdffc4845f035549f

Patch