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CVE-2023-53456

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: scsi: qla4xxx: Add length check when parsing nlattrs There are three places that qla4xxx parses nlattrs: - qla4xxx_set_chap_e…

Published Oct 1, 2025EPSS 0.16%

Overview

CVE-2023-53456 is a medium-severity vulnerability. It was published on October 1, 2025 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:

scsi: qla4xxx: Add length check when parsing nlattrs

There are three places that qla4xxx parses nlattrs:

- qla4xxx_set_chap_entry()

- qla4xxx_iface_set_param()

- qla4xxx_sysfs_ddb_set_param()

and each of them directly converts the nlattr to specific pointer of

structure without length checking. This could be dangerous as those

attributes are not validated and a malformed nlattr (e.g., length 0) could

result in an OOB read that leaks heap dirty data.

Add the nla_len check before accessing the nlattr data and return EINVAL if

the length check fails.

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/25feffb3fbd51ae81d92c65cebc0e932663828b3Refgit.kernel.org/stable/c/47cd3770e31df942e2bb925a9a855c79ed0662ebRefgit.kernel.org/stable/c/47f3be62eab50b8cd7e1ae5fc2c4dae687497c34Refgit.kernel.org/stable/c/4ed21975311247bb84e82298eeb359ec0a0fa84dRefgit.kernel.org/stable/c/5925e224cc6edfef57b20447f18323208461309bRefgit.kernel.org/stable/c/6d65079c69dc1feb817ed71f5bd15e83a7d6832dRefgit.kernel.org/stable/c/b018c0440b871d8b001c996e95fa4538bd292de6Refgit.kernel.org/stable/c/cfa6a1a79ed6d336fac7a5d87eb5471e4401829fRefgit.kernel.org/stable/c/f61fc650c47849637fa1771a31a11674c824138a

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53456?

CVE-2023-53456 is a medium-severity vulnerability. It was published on October 1, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53456?

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-2023-53456?

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-2023-53456?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53456 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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