CVE-2023-54031
Unknown Unknown - Not Provided
Out-of-Bounds Read in Linux vdpa_nl_policy Due to Missing Attribute

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: vdpa: Add queue index 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 queue index attr to avoid such bugs.
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Meta Information
Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-06-16
AI Q&A
2025-12-24
EPSS Evaluated
2026-06-15
NVD
CVE-2023-54031
EUVD
EUVD-2025-205133
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel involves the vdpa_nl_policy structure, which is responsible for validating netlink attributes (nlattr) when parsing incoming netlink messages (nlmsg). The vulnerability arises because the vdpa_nl_policy was missing the queue index attribute, which could lead to an illegal nlattr pointer after parsing. This improper validation can cause an out-of-bounds (OOB) read, similar to the issue described in CVE-2023-3773. The patch fixes this by adding the missing nla_policy for the vdpa queue index attribute to prevent such bugs.

Impact Analysis

This vulnerability can lead to an out-of-bounds read in the Linux kernel when processing netlink messages related to vdpa. Such OOB reads can cause system instability, crashes, or potentially expose sensitive kernel memory, which may be exploited by attackers to gain unauthorized information or cause denial of service.

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