CVE-2025-39775

kernel: Linux kernel: mremap local denial of service

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 11, 2025

Updated · June 30, 2026

Description

A flaw was found in the Linux kernel. This vulnerability allows a local attacker to cause a denial of service via a specific mremap() operation with userfaultd.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE not specified