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CVE-2023-53681

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent In some specific situations, the return value of __b…

Published Oct 7, 2025CWE-476EPSS 0.14%

Overview

CVE-2023-53681 is a medium-severity vulnerability. It was published on October 7, 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:

bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent

In some specific situations, the return value of __bch_btree_node_alloc

may be NULL. This may lead to a potential NULL pointer dereference in

caller function like a calling chain :

btree_split->bch_btree_node_alloc->__bch_btree_node_alloc.

Fix it by initializing the return value in __bch_btree_node_alloc.

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/4514847aee18d9391a0cf3aad75d3567c72795a4Refgit.kernel.org/stable/c/587b4e8bb5dac682f09280ab35db4632b29d5ac4Refgit.kernel.org/stable/c/7ecea5ce3dc17339c280c75b58ac93d8c8620d9fRefgit.kernel.org/stable/c/80fca8a10b604afad6c14213fdfd816c4eda3ee4Refgit.kernel.org/stable/c/a4405f6ee03323410d7b10966fd67b35f71b1944Refgit.kernel.org/stable/c/b070f29a61436f6f8a2e3abc7ea4f4be81695198Refgit.kernel.org/stable/c/f67b0e3081f2a24170280a33ac66f6b112083c03

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53681?

CVE-2023-53681 is a medium-severity vulnerability. It was published on October 7, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53681?

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-2023-53681?

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-2023-53681?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53681 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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