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

Harry · Published 2025-09-11 · Updated 2026-03-13 · CVE-2025-39775

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV: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

Related Identifiers

CVE-2025-39775

OPENSUSE-SU-2025:20081-1

SUSE-SU-2025:21074-1

SUSE-SU-2025:21139-1

SUSE-SU-2025:21179-1

Affected Products

Astra Linux

Debian

Linux Kernel

Suse

References · 1263

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39775.json · Exploit
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-13-CVE-2025-39775 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:20081-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-39775 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:21139-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-39775 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-39775 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-39775 · Security Note
• https://git.kernel.org/stable/c/d70ca21f7bff162a5afae1ddd6f4107adf05ae23 · Patch
• https://git.kernel.org/stable/c/772e5b4a5e8360743645b9a466842d16092c4f94 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:21074-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-39775 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-39775 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-39775 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:21179-1 · Vendor Advisory