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CVE-2026-46023

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: dm mirror: fix integer overflow in create_dirty_log() The argument count calculation in create_dirty_log() performs `*args_used…

Published May 27, 2026CWE-190EPSS 0.18%

Overview

CVE-2026-46023 is a medium-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

dm mirror: fix integer overflow in create_dirty_log()

The argument count calculation in create_dirty_log() performs

`*args_used = 2 + param_count` before validating against argc. When a

user provides a param_count close to UINT_MAX via the device mapper

table string, this unsigned addition wraps around to a small value,

causing the subsequent `argc < *args_used` check to be bypassed.

The overflowed param_count is then passed as argc to dm_dirty_log_create(),

where it can cause out-of-bounds reads on the argv array.

Fix by comparing param_count against argc - 2 before performing the

addition, following the same pattern used by parse_features() in the

same file. Since argc >= 2 is already guaranteed, the subtraction is

safe.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/17a08791d428885d00e510864283a7b839792368Refgit.kernel.org/stable/c/249c831183fb806c8e3b14c7c4c1d2fb68cf37fbRefgit.kernel.org/stable/c/35f6b3281efd44d19110574663bc17a610bc73b9Refgit.kernel.org/stable/c/47dad9eea75d33212d3d2cea10e7ed6a1bfc0713Refgit.kernel.org/stable/c/4c788c6f921b22f9b6c3f316c4a071c05683e7deRefgit.kernel.org/stable/c/87c99a50e0fdc68a5b9b52a94d49452cd3ff02caRefgit.kernel.org/stable/c/ae59b3025609d5a0a39cf5b2b94e2467f6231573Refgit.kernel.org/stable/c/e5e0ae3237584ebef510366c4cb3d5cc7c22b610

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46023?

CVE-2026-46023 is a medium-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-46023?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-46023?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-46023?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46023 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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