PT-2025-8800 · Linux+2 · Linux Kernel+2

Published 2025-01-27 · Updated 2025-06-16 · CVE-2025-21717

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A vulnerability in the Linux kernel has been resolved. The issue is related to the kvzalloc node function not performing a runtime check on the node argument, which can lead to out-of-bounds access and panic when performing certain ethtool or netlink operations on a CPU with an ID larger than MAX NUMNODES. The vulnerability can be triggered by calling mlx5e open on a CPU that's larger than MAX NUMNODES, resulting in a page fault and kernel panic.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Out of bounds Read

Buffer Overflow

Weakness Enumeration

CWE-125

CWE-119

Related Identifiers

BDU:2026-03918

CVE-2025-21717

SUSE-SU-2025:01951-1

SUSE-SU-2025:01967-1

SUSE-SU-2025_01951-1

SUSE-SU-2025_01967-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 821

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21717.json · Exploit
• https://osv.dev/vulnerability/SUSE-SU-2025:01951-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21717 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:01967-1 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2026-50232.html · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2026-50160.html · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-21717 · Security Note
• https://osv.dev/vulnerability/CVE-2025-21717 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21717 · Security Note
• https://git.kernel.org/stable/c/a275db45b4161d01716559dd7557db9ea0450952 · Patch
• https://bdu.fstec.ru/vul/2026-03918 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-21717 · Vendor Advisory
• https://git.kernel.org/stable/c/979284535aaf12a287a2f43d9d5dfcbdc1dc4cac · Patch
• https://suse.com/security/cve/CVE-2025-37809 · Note
• https://suse.com/security/cve/CVE-2025-21892 · Note