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CVE-2026-92489

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix skb double-free in xfrm_dev_direct_output() A return value other than 1 from local_out() means that the skb has been…

Published Sep 17, 2026EPSS 0.46%

Overview

CVE-2026-92489 is a critical-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

xfrm: Fix skb double-free in xfrm_dev_direct_output()

A return value other than 1 from local_out() means that the skb has been

consumed or its ownership was transferred. xfrm_dev_direct_output()

nevertheless frees the skb on this path, causing a double-free when

netfilter drops the packet and invalidating any other owner.

Return the local_out() result directly, matching the ownership handling

in xfrm_output_resume().

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/02deb637e965950148752a304dd1471212dd6470Refgit.kernel.org/stable/c/2aed51fc58d9ce450e2c116efb956160fd06fa02Refgit.kernel.org/stable/c/56a347950e661c1a7f8f31c43a2ea53c2323b6f4Refgit.kernel.org/stable/c/621871b696b108026bf4b44ed4085ffa2102f417Refgit.kernel.org/stable/c/bc9297796bfdcc8d9609236e54519a4f38737aac

How CyberStrike helps

Frequently asked questions

What is CVE-2026-92489?

CVE-2026-92489 is a critical-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-92489?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-92489?

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-2026-92489?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-92489 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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