PT-2025-40077 · Linux+3 · Linux Kernel+3

Yintirui · Published 2025-09-09 · Updated 2025-11-26 · CVE-2025-39903

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-rc1-00001-gabb4b3daf18c-dirty

Description The Linux kernel contained a flaw where memory-only nodes (nodes without CPUs) were not properly initialized. This resulted in a kernel panic during boot when the system attempted to access uninitialized memory nodes via the free area init() function, leading to a NULL pointer dereference. The issue stemmed from the of numa parse cpu nodes function updating numa nodes parsed only for nodes containing CPUs, while memory-only nodes should have been updated in of numa parse memory nodes. The vulnerability can be reproduced on ARM64 QEMU with 1 CPU and 2 memory nodes. The functions involved are of numa init, of numa parse cpu nodes, and of numa parse memory nodes.

Recommendations Update to a version newer than 6.17.0-rc1-00001-gabb4b3daf18c-dirty.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2025-15668

CVE-2025-39903

OPENSUSE-SU-2025:20091-1

SUSE-SU-2025:21080-1

SUSE-SU-2025:21147-1

SUSE-SU-2025:21180-1

Affected Products

Astra Linux

Linux Kernel

Qemu

Suse

References · 211

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39903.json · Exploit
• https://wiki.astralinux.ru/astra-linux-se18-bulletin-2025-1113SE18 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2025-25754.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:21180-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:21147-1 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2025-39903 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:20091-1 · Vendor Advisory
• https://git.kernel.org/stable/c/c2daa6eb4740720b5bd0e06267d7c93a3eed844e · Patch
• https://ubuntu.com/security/CVE-2025-39903 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-39903 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-15668 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-39903 · Security Note
• https://cve.org/CVERecord?id=CVE-2025-39903 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-39903 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:21080-1 · Vendor Advisory