Vulnerability 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. [[email protected]: remove extra folio check, per David]
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.8, < 6.12.43 |
References
- https://git.kernel.org/stable/c/1202abad7a7ccd28c426d2844771a387b07629a4Patch
- https://git.kernel.org/stable/c/7f1101a0a181243ad587ececdffc4845f035549fPatch
- https://git.kernel.org/stable/c/aba6faec0103ed8f169be8dce2ead41fcb689446Patch
- https://git.kernel.org/stable/c/bb81c18dbd42650c844e160cafa7cbb20243a96aPatch
FAQ
What is CVE-2025-38686?
CVE-2025-38686 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 procee...
How severe is CVE-2025-38686?
CVE-2025-38686 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-38686?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.