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CVE-2026-90419

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: nilfs2: prevent out-of-bounds read in super root block parsing super-root inode metadata size is trusted before nilfs_read_inod…

Published Sep 17, 2026EPSS 0.18%

Overview

CVE-2026-90419 is a high-severity vulnerability. It was published on September 17, 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:

nilfs2: prevent out-of-bounds read in super root block parsing

super-root inode metadata size is trusted before nilfs_read_inode_common().

Reject super-root inode sizes whose computed on-disk footprint exceeds the

filesystem block size. This prevents malformed filesystem images from

making nilfs_read_inode_common() read past the end of the super-root block.

[ryusuke: clarify the commit title]

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/15c8559376416a84c3d8402fd8d0c89bb323d05fRefgit.kernel.org/stable/c/16df2520502867a4f34e202b89d01243d59bb8b5Refgit.kernel.org/stable/c/5b69ebe20d7f944c1f45177dca0c11474ac277ccRefgit.kernel.org/stable/c/7029e70cf86d5c54c0a2812479b0bee2cabcbaaaRefgit.kernel.org/stable/c/71bd64471ff583101b4a33dfc838ce29aef57960Refgit.kernel.org/stable/c/7cb2f76a6a2ba2130b577cb8ac13e1e46c4fc689Refgit.kernel.org/stable/c/842397fdfd2e61d6470166c796f3125b6c27a162Refgit.kernel.org/stable/c/dcc85fc28f884038735464f6f104dda9c7dbfad6

How CyberStrike helps

Frequently asked questions

What is CVE-2026-90419?

CVE-2026-90419 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-90419?

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-2026-90419?

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-2026-90419?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-90419 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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