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CVE-2026-46078

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: erofs: fix the out-of-bounds nameoff handling for trailing dirents Currently we already have boundary-checks for nameoffs, but…

Published May 27, 2026CWE-125EPSS 0.13%

Overview

CVE-2026-46078 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

erofs: fix the out-of-bounds nameoff handling for trailing dirents

Currently we already have boundary-checks for nameoffs, but the trailing

dirents are special since the namelens are calculated with strnlen()

with unchecked nameoffs.

If a crafted EROFS has a trailing dirent with nameoff >= maxsize,

maxsize - nameoff can underflow, causing strnlen() to read past the

directory block.

nameoff0 should also be verified to be a multiple of

`sizeof(struct erofs_dirent)` as well [1].

[1] https://sashiko.dev/#/patchset/20260416063511.3173774-1-hsiangkao%40linux.alibaba.com

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/1d55445226c75ddd4e78b09b3e7d99109b28c366Refgit.kernel.org/stable/c/222055e6b4063abd2d9e13c3d49bbd1724c50789Refgit.kernel.org/stable/c/48b27a955d22391c7f30169fa7b6b2e1977f1ce4Refgit.kernel.org/stable/c/80a23c6d1aba35be8746d74ac14e6ba5ae46da21Refgit.kernel.org/stable/c/8ebb951a284b7446e025afc7dc5e9516ef9a7214Refgit.kernel.org/stable/c/a8ee527807f7d97e55ce2ef2906f7f34975eb1c7Refgit.kernel.org/stable/c/aa16dca1b062355181ef215229eeac249d7c0d61Refgit.kernel.org/stable/c/d18a3b5d337fa412a38e776e6b4b857a58836575

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46078?

CVE-2026-46078 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-46078?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-46078?

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-2026-46078?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46078 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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