CVE-2023-53543: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: vdpa: Add max vqp attr to vdpa_nl_policy for nlattr length check The vdpa_nl_policy structure is used to validate the nlattr when parsing the incoming nlmsg. It will ensure the attribute being described produces a valid nlattr pointer in info->attrs before entering into each handler in vdpa_nl_ops. That is to say, the missing part in vdpa_nl_policy may lead to illegal nlattr after parsing, which could lead to OOB read just like CVE-2023-3773. This patch adds the missing nla_policy for vdpa max vqp attr to avoid such bugs.

Affected products

• Linux Linux Kernel: from 5.15.198, before 5.15.209 (fixed in 5.15.209); from 5.16, before 6.1.47 (fixed in 6.1.47); from 6.2, before 6.4.12 (fixed in 6.4.12); version 6.5 only

Published 2025-10-04. Last modified 2026-06-18.