CVE-2026-98251

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc2ac667358708d7cce64c78f58af6adf4c1e848b < 4371d79ea74407fb992c985b1f94391e35bb8289affected
LinuxLinuxc2ac667358708d7cce64c78f58af6adf4c1e848b < 7ff688aceada1160331a789385ea146f62fbddf7affected
LinuxLinuxc2ac667358708d7cce64c78f58af6adf4c1e848b < 05eab8dced6bf4d3009a6eeee16ddac99047dc83affected
LinuxLinuxc2ac667358708d7cce64c78f58af6adf4c1e848b < 579d87ec1e1e85729a6cb2c25961e58beb78640caffected
LinuxLinuxc2ac667358708d7cce64c78f58af6adf4c1e848b < 2e6dd889c325abf23821e1459c3ffef59b7f0009affected
LinuxLinuxc2ac667358708d7cce64c78f58af6adf4c1e848b < d16f089bd700f45d720ce989d5495e1dc3be0cf8affected
LinuxLinuxc2ac667358708d7cce64c78f58af6adf4c1e848b < 8c9fcc6c33950d3db551af664d1fd3d998bfee56affected
LinuxLinuxc2ac667358708d7cce64c78f58af6adf4c1e848b < 3f118c8217c109fd13ca61caa301d72c483897efaffected
LinuxLinux4.3affected
LinuxLinux0 < 4.3unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References