High 7.8Published Oct 6, 2026

CVE-2026-98251openvswitch: avoid reallocating confirmed conntrack labels

Updated under an hour ago (Oct 27, 2026, 11:40 AM ET)

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EPSS puts the chance of exploitation in the next 30 days at 0.14%, higher than 3% of scored CVEs.

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.14% (percentile 3)
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from c2ac667358708d7cce64c78f58af6adf4c1e848b before 4371d79ea74407fb992c985b1f94391e35bb8289; from c2ac667358708d7cce64c78f58af6adf4c1e848b before 7ff688aceada1160331a789385ea146f62fbddf7; from c2ac667358708d7cce64c78f58af6adf4c1e848b before 05eab8dced6bf4d3009a6eeee16ddac99047dc83; from c2ac667358708d7cce64c78f58af6adf4c1e848b before 579d87ec1e1e85729a6cb2c25961e58beb78640c; from c2ac667358708d7cce64c78f58af6adf4c1e848b before 2e6dd889c325abf23821e1459c3ffef59b7f0009; from c2ac667358708d7cce64c78f58af6adf4c1e848b before d16f089bd700f45d720ce989d5495e1dc3be0cf8; from c2ac667358708d7cce64c78f58af6adf4c1e848b before 8c9fcc6c33950d3db551af664d1fd3d998bfee56; from c2ac667358708d7cce64c78f58af6adf4c1e848b before 3f118c8217c109fd13ca61caa301d72c483897ef	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.