{"id":"CVE-2026-98692","title":"thunderbolt: Make the DP tunnel activation callback mandatory","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Make the DP tunnel activation callback mandatory\n\ntb_tunnel_alloc_dp() takes an optional callback which is run from\ndprx_work once the DPRX capabilities re…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= d6d458d42e1e1544a18f37f1d5c840e00d5261b9 < 47d60ea801fc333a10c576691eca2e7840b02d3d","Linux >= d6d458d42e1e1544a18f37f1d5c840e00d5261b9 < 12f5d8b85a66a0ac08d082517d92ce136f8c0d42","Linux 6.14"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:46:16.794Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98692","references":[{"url":"https://git.kernel.org/stable/c/47d60ea801fc333a10c576691eca2e7840b02d3d"},{"url":"https://git.kernel.org/stable/c/12f5d8b85a66a0ac08d082517d92ce136f8c0d42"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.528Z","slug":"CVE-2026-98692","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Make the DP tunnel activation callback mandatory\n\ntb_tunnel_alloc_dp() takes an optional callback which is run from\ndprx_work once the DPRX capabilities read has completed. Without that\ncallback tb_dp_dprx_start() reads the capabilities synchronously and\nnever queues the work. It however always takes a tunnel reference which\nis only dropped by dprx_work itself or by tb_dp_dprx_stop() when\ncancel_delayed_work() actually canceled that work. That reference is\nthus leaked for every tunnel without a callback.\n\nThe only tunnels without one are those from tb_tunnel_discover_dp(),\nwhich are activated again when restoring from hibernation.\nPass the callback to tb_tunnel_discover_dp() as well and drop the\nsynchronous path such that the DPRX capabilities are always read from\ndprx_work. Hibernation restore then also no longer blocks for up to 12\nseconds while waiting for that read to complete.\n\nAlso fix up the KUnit tests.\n\n## Affected\n\n- `Linux >= d6d458d42e1e1544a18f37f1d5c840e00d5261b9 < 47d60ea801fc333a10c576691eca2e7840b02d3d`\n- `Linux >= d6d458d42e1e1544a18f37f1d5c840e00d5261b9 < 12f5d8b85a66a0ac08d082517d92ce136f8c0d42`\n- `Linux 6.14`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}