PT-2025-37233 · Linux+3 · Linux Kernel+3

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CVE-2025-39775

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Published

2025-08-18

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Updated

2026-08-30

CVSS v3.1

5.5

Medium

VectorAV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions:

Linux kernel versions prior to 6.17.0-rc1-syzkaller-00004-g53e760d89498

Description:

The Linux kernel contained a flaw in the mm/mremap module related to handling userfaultd (uffd) registered on a Virtual Memory Area (VMA) that spans at least one Page Medium Descriptor (PMD) during a mremap() operation. Specifically, a warning could be triggered when recovering from a failed page table move due to a page table allocation error. The issue stemmed from a lack of recursion during the recovery move, which occurred during the original page table move.

Recommendations:

Update the Linux kernel to version 6.17.0-rc1-syzkaller-00004-g53e760d89498 or a later version to resolve this issue.

Exploit

Fix

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Weakness Enumeration

Related Identifiers

BDU:2026-09211
CVE-2025-39775
OPENSUSE-SU-2025:20081-1
SUSE-SU-2025:21074-1
SUSE-SU-2025:21139-1
SUSE-SU-2025:21179-1
SUSE-SU-2026:20560-1

Affected Products

Astra Linux
Debian
Linux Kernel
Suse