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CVE-2026-46072

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ntfs3: add buffer boundary checks to run_unpack() run_unpack() checks `run_buf < run_last` at the top of the while loop but the…

Published May 27, 2026EPSS 0.16%

Overview

CVE-2026-46072 is a medium-severity vulnerability. It was published on May 27, 2026 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:

ntfs3: add buffer boundary checks to run_unpack()

run_unpack() checks `run_buf < run_last` at the top of the while loop

but then reads size_size and offset_size bytes via run_unpack_s64()

without verifying they fit within the remaining buffer. A crafted NTFS

image with truncated run data in an MFT attribute triggers an OOB heap

read of up to 15 bytes when the filesystem is mounted.

Add boundary checks before each run_unpack_s64() call to ensure the

declared field size does not exceed the remaining buffer.

Found by fuzzing with a source-patched harness (LibAFL + QEMU).

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/41aadf5cb482793a24e05aa136224e179a778586Refgit.kernel.org/stable/c/425de2aba0d061b3e715d51a3b1992c112ed5b99Refgit.kernel.org/stable/c/b62567bca47408e6739dee75f02a2113548af875Refgit.kernel.org/stable/c/bbad75336870b51b81979b97613746237fcb02feRefgit.kernel.org/stable/c/bf7ac4a1d3bfc6e56e54635c3d331a68170d37c9Refgit.kernel.org/stable/c/d3012690a7065d9ca86521a525ad11e8af491d45Refgit.kernel.org/stable/c/e64f7dfcaff79e7dfff9121a382dd77f9b462f62

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46072?

CVE-2026-46072 is a medium-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-46072?

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-2026-46072?

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-2026-46072?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46072 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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