CVE-2026-98251high

CVE-2026-98251: high-severity vulnerability in Linux

openvswitch: avoid reallocating confirmed conntrack labels

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/05eab8dced6bf4d3009a6eeee16ddac99047dc83https://git.kernel.org/stable/c/2e6dd889c325abf23821e1459c3ffef59b7f0009https://git.kernel.org/stable/c/3f118c8217c109fd13ca61caa301d72c483897efhttps://git.kernel.org/stable/c/4371d79ea74407fb992c985b1f94391e35bb8289https://git.kernel.org/stable/c/579d87ec1e1e85729a6cb2c25961e58beb78640chttps://git.kernel.org/stable/c/7ff688aceada1160331a789385ea146f62fbddf7https://git.kernel.org/stable/c/8c9fcc6c33950d3db551af664d1fd3d998bfee56https://git.kernel.org/stable/c/d16f089bd700f45d720ce989d5495e1dc3be0cf8