What is CVE-2025-39775?

CVE-2025-39775 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2025-09-11.

How severe is CVE-2025-39775?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Linux

CVE-2025-39775

In the Linux kernel, the following vulnerability has been resolved: mm/mremap: fix WARN with uffd that has remap events disabled Registering userfaultd on a VMA that spans at least one PMD and then mremap()'ing that VMA can trigger a WAR…

EPSS: 0.001 (2.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 6.12.11, 310ac886d68de661c3a334198d8604b722d7fdf8, 6.17
Linux Linux_kernel — versions 6.13, 6.17

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2025-39775?: CVE-2025-39775 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2025-09-11.
How severe is CVE-2025-39775?: Medium severity. CVSS v3 base score is 5.5 out of 10.