CVE-2024-27007

kernel: userfaultfd: change src_folio after ensuring it's unpinned in UFFDIO_MOVE

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · May 1, 2024

Updated · August 18, 2026

Description

A flaw was found in the Linux kernel's userfaultfd component, specifically in the handling of huge pages during the UFFDIO_MOVE operation. A local attacker could exploit improper management of memory pages, which could lead to memory corruption. This could result in a system crash or other unpredictable behavior, potentially leading to a Denial of Service (DoS) or further compromise.

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-367 · Time-of-check Time-of-use (TOCTOU) Race Condition