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CVE-2023-52837

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: nbd: fix uaf in nbd_open Commit 4af5f2e03013 ("nbd: use blk_mq_alloc_disk and blk_cleanup_disk") cleans up disk by blk_cleanup_…

Published May 21, 2024CWE-416EPSS 0.25%

Overview

CVE-2023-52837 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

nbd: fix uaf in nbd_open

Commit 4af5f2e03013 ("nbd: use blk_mq_alloc_disk and

blk_cleanup_disk") cleans up disk by blk_cleanup_disk() and it won't set

disk->private_data as NULL as before. UAF may be triggered in nbd_open()

if someone tries to open nbd device right after nbd_put() since nbd has

been free in nbd_dev_remove().

Fix this by implementing ->free_disk and free private data in it.

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/327462725b0f759f093788dfbcb2f1fd132f956bRefgit.kernel.org/stable/c/4e9b3ec84dc97909876641dad14e0a2300d6c2a3Refgit.kernel.org/stable/c/56bd7901b5e9dbc9112036ea615ebcba1565fafeRefgit.kernel.org/stable/c/879947f4180bc6e83af64eb0515e0cf57fce15dbRefgit.kernel.org/stable/c/327462725b0f759f093788dfbcb2f1fd132f956bRefgit.kernel.org/stable/c/4e9b3ec84dc97909876641dad14e0a2300d6c2a3Refgit.kernel.org/stable/c/56bd7901b5e9dbc9112036ea615ebcba1565fafeRefgit.kernel.org/stable/c/879947f4180bc6e83af64eb0515e0cf57fce15db

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52837?

CVE-2023-52837 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-52837?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-52837?

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-2023-52837?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52837 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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