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CVE-2023-53055

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: fscrypt: destroy keyring after security_sb_delete() fscrypt_destroy_keyring() must be called after all potentially-encrypted in…

Published May 2, 2025CWE-476EPSS 0.20%

Overview

CVE-2023-53055 is a medium-severity vulnerability. It was published on May 2, 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:

fscrypt: destroy keyring after security_sb_delete()

fscrypt_destroy_keyring() must be called after all potentially-encrypted

inodes were evicted; otherwise it cannot safely destroy the keyring.

Since inodes that are in-use by the Landlock LSM don't get evicted until

security_sb_delete(), this means that fscrypt_destroy_keyring() must be

called *after* security_sb_delete().

This fixes a WARN_ON followed by a NULL dereference, only possible if

Landlock was being used on encrypted files.

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/497ab5d9c7852dfedab2c9de75e41b60e54b7c5dRefgit.kernel.org/stable/c/992a3f3e8a0c92151dfdf65fc85567c865fd558aRefgit.kernel.org/stable/c/ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5aRefgit.kernel.org/stable/c/d77531fac6a1fd9f1db0195438ba5419d72b96c4

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53055?

CVE-2023-53055 is a medium-severity vulnerability. It was published on May 2, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53055?

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-2023-53055?

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-2023-53055?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53055 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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