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CVE-2026-89606

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ecryptfs: reject too-small tag 70 packets ecryptfs_parse_tag_70_packet() subtracts fixed metadata fields from the parsed packet…

Published Sep 11, 2026EPSS 0.14%

Overview

CVE-2026-89606 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, 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:

ecryptfs: reject too-small tag 70 packets

ecryptfs_parse_tag_70_packet() subtracts fixed metadata fields from the

parsed packet body size to derive the encrypted filename size. A

malformed packet with a body smaller than those fixed fields can underflow

that size calculation.

Reject tag 70 packets before the subtraction unless the body contains the

signature, cipher code, and at least one byte of encrypted filename data.

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/2e5afed9503dd1d85004c09503adc2cb584c0188Refgit.kernel.org/stable/c/414a0f04feb06f03523edf7e2a8be1d7f1a9b160Refgit.kernel.org/stable/c/5668121974eb7f7aa82793a9d0d13abadb8904dcRefgit.kernel.org/stable/c/9d88391bbed76eb091cddd50b0af87b1c6f22589Refgit.kernel.org/stable/c/b31da1ecf13929a8d7f8d2727843d2fe35396b75Refgit.kernel.org/stable/c/d2869768eab5648e6edc05f47e0716e5328e6681Refgit.kernel.org/stable/c/df5f375a6151ef71f636da044bcef90c26697255Refgit.kernel.org/stable/c/e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89606?

CVE-2026-89606 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-89606?

This vulnerability has a CVSS 3.1 base score of 7.8, 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-2026-89606?

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-2026-89606?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89606 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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