PT-2025-40685 · Linux+1 · Linux Kernel+1

Published 2025-10-04 · Updated 2026-02-25 · CVE-2023-53543

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description The vdpa nl policy structure, used for validating netlink attributes (nlattr) during message parsing, lacked a necessary check for the maximum virtual queue pair (VQP) attribute. This missing check could lead to illegal nlattr values after parsing, potentially resulting in an out-of-bounds (OOB) read, similar to CVE-2023-3773. The issue has been addressed by adding the missing nla policy for the vdpa max vqp attribute. The vdpa nl policy structure ensures a valid pointer in info->attrs before entering handlers in vdpa nl ops.

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

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

AZL-78264

CVE-2023-53543

SUSE-SU-2025:21040-1

SUSE-SU-2025:21052-1

SUSE-SU-2025:21056-1

SUSE-SU-2025:21064-1

SUSE-SU-2025:4057-1

SUSE-SU-2025:4128-1

SUSE-SU-2025:4132-1

SUSE-SU-2025:4140-1

SUSE-SU-2025:4141-1

SUSE-SU-2025:4301-1

Affected Products

Linux Kernel

Suse

References · 1013

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53543.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53543 · Vendor Advisory
• https://git.kernel.org/stable/c/5d6ba607d6cb5c58a4ddf33381e18c83dbb4098f · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:4301-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4128-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4141-1 · Vendor Advisory
• https://git.kernel.org/stable/c/ea65e8b5e6b1a34deda7564f09c90e9e80db436a · Patch
• https://osv.dev/vulnerability/CVE-2023-53543 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53543 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:21052-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4057-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53543 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53543 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53543 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:4140-1 · Vendor Advisory