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CVE-2023-53360

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: NFSv4.2: Rework scratch handling for READ_PLUS (again) I found that the read code might send multiple requests using the same n…

Published Sep 17, 2025CWE-415EPSS 0.41%

Overview

CVE-2023-53360 is a critical-severity vulnerability. It was published on September 17, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

NFSv4.2: Rework scratch handling for READ_PLUS (again)

I found that the read code might send multiple requests using the same

nfs_pgio_header, but nfs4_proc_read_setup() is only called once. This is

how we ended up occasionally double-freeing the scratch buffer, but also

means we set a NULL pointer but non-zero length to the xdr scratch

buffer. This results in an oops the first time decoding needs to copy

something to scratch, which frequently happens when decoding READ_PLUS

hole segments.

I fix this by moving scratch handling into the pageio read code. I

provide a function to allocate scratch space for decoding read replies,

and free the scratch buffer when the nfs_pgio_header is freed.

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/303a78052091c81e9003915c521fdca1c7e117afRefgit.kernel.org/stable/c/a2f4cb206bd94b3f4a7bb05fcdce9525283b5681Refgit.kernel.org/stable/c/adac9f0ddd2b291c7ce41f549fdb27a13616cff5Refgit.kernel.org/stable/c/ae5d5672f1db711e91db6f52df5cb16ecd8f5692

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53360?

CVE-2023-53360 is a critical-severity vulnerability. It was published on September 17, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2023-53360?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-53360?

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-2023-53360?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53360 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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