Vulnerability in Linux

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund5 Oct 2026WID-SEC-2026-3743

  Linux Kernel: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-98221CVE-2026-98181CVE-2026-98248+204 more CVEs

[ References ]References

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