CVE-2026-98251

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.

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EPSS — Exploit Prediction

0.0018

Probability of exploitation

0.07%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/05eab8dced6bf4d3009a6eeee16ddac99047dc83 https://git.kernel.org/stable/c/2e6dd889c325abf23821e1459c3ffef59b7f0009 https://git.kernel.org/stable/c/3f118c8217c109fd13ca61caa301d72c483897ef https://git.kernel.org/stable/c/4371d79ea74407fb992c985b1f94391e35bb8289 https://git.kernel.org/stable/c/579d87ec1e1e85729a6cb2c25961e58beb78640c https://git.kernel.org/stable/c/7ff688aceada1160331a789385ea146f62fbddf7 https://git.kernel.org/stable/c/8c9fcc6c33950d3db551af664d1fd3d998bfee56 https://git.kernel.org/stable/c/d16f089bd700f45d720ce989d5495e1dc3be0cf8

Frequently Asked Questions

What is CVE-2026-98251? +

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.

How do I check if I'm vulnerable to CVE-2026-98251? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.