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openvswitch: avoid reallocating confirmed conntrack labels

Exact source revision recorded 23 Oct 2026 15:48:27 UTC. It does not establish the source's current position. Latest evidence.

cve-program · CVE-2026-98251

Published

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.

Source published
6 Oct 2026 08:45:18 UTC
Source modified
19 Oct 2026 09:16:22 UTC
Observed here
23 Oct 2026 15:48:27 UTC
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CVSS 3.1 · 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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Sources read 9 Nov 00:13 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current