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CVE-2026-89838

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: f2fs: limit recovery filename logging to stored length F2FS stores recovery filenames as a length plus a fixed-size i_name buffer.

Published Sep 16, 2026EPSS 0.17%

Overview

CVE-2026-89838 is a high-severity vulnerability. It was published on September 16, 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. Some level of privileges is required for exploitation.

Technical description

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

f2fs: limit recovery filename logging to stored length

F2FS stores recovery filenames as a length plus a fixed-size i_name

buffer. The buffer is not NUL-terminated, but recover_inode() and

recover_dentry() print it with %s.

For a 255-byte filename, recovery logging can read past i_name into the

following raw inode fields.

Print the name with a precision bounded by i_namelen and F2FS_NAME_LEN.

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/01027b2fcb74dade59fb833b51023f6593b6a9a2Refgit.kernel.org/stable/c/317d32e1a8deaf1c01c388badc667334c39e62caRefgit.kernel.org/stable/c/35c5abccd0924b02ad34126f562d93c8d75b0831Refgit.kernel.org/stable/c/3d02c7c8446f5d6793ac67f93bf3f84bf24e3f25Refgit.kernel.org/stable/c/450ab2e5dbe0ef6e3ed73214256565f6f003d62aRefgit.kernel.org/stable/c/7ab1780074943508534343e1e5e5ab0c9ef9dd7bRefgit.kernel.org/stable/c/b8ac8b14b9d92dd2e1cb05fa8994f41f701fbf28Refgit.kernel.org/stable/c/e754120f8ede55cc773ade108cf7e5b17c859c46

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89838?

CVE-2026-89838 is a high-severity vulnerability. It was published on September 16, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-89838?

This vulnerability has a CVSS 3.1 base score of 7.1, 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-2026-89838?

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-2026-89838?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89838 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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