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CVE-2026-98251

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: openvswitch: avoid reallocating confirmed conntrack labels ovs_ct_get_conn_labels() adds the labels extension when a conntrack…

Published Oct 6, 2026EPSS 0.13%

Overview

CVE-2026-98251 is a high-severity vulnerability. It was published on October 6, 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:

openvswitch: avoid reallocating confirmed conntrack labels

ovs_ct_get_conn_labels() adds the labels extension when a conntrack

entry does not have one. Confirmed conntracks can be read locklessly,

so adding an extension may reallocate and free the extension block

while another CPU accesses it.

Only add the extension for unconfirmed conntracks. A confirmed

conntrack without labels now fails the caller's label operation instead

of reallocating its extension storage.

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/05eab8dced6bf4d3009a6eeee16ddac99047dc83Refgit.kernel.org/stable/c/2e6dd889c325abf23821e1459c3ffef59b7f0009Refgit.kernel.org/stable/c/3f118c8217c109fd13ca61caa301d72c483897efRefgit.kernel.org/stable/c/4371d79ea74407fb992c985b1f94391e35bb8289Refgit.kernel.org/stable/c/579d87ec1e1e85729a6cb2c25961e58beb78640cRefgit.kernel.org/stable/c/7ff688aceada1160331a789385ea146f62fbddf7Refgit.kernel.org/stable/c/8c9fcc6c33950d3db551af664d1fd3d998bfee56Refgit.kernel.org/stable/c/d16f089bd700f45d720ce989d5495e1dc3be0cf8

How CyberStrike helps

Frequently asked questions

What is CVE-2026-98251?

CVE-2026-98251 is a high-severity vulnerability. It was published on October 6, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-98251?

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-2026-98251?

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-2026-98251?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-98251 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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