{"id":"CVE-2026-98689","title":"thunderbolt: Don't access a DP tunnel after its DPRX read was canceled","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Don't access a DP tunnel after its DPRX read was canceled\n\ntb_dp_dprx_work() checks ->dprx_canceled before it takes tb->lock so it\nmisses a tb_dp_dprx_stop…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= d6d458d42e1e1544a18f37f1d5c840e00d5261b9 < 405a969c0b3356639116db89ab367be1d64b77c0","Linux >= d6d458d42e1e1544a18f37f1d5c840e00d5261b9 < 2c2fd6a7fd5e1218db7e17336fc1a0393b6949e6","Linux >= d6d458d42e1e1544a18f37f1d5c840e00d5261b9 < 419fa32fa5bc2d7fb9d0d15d5630b1c1090808b3","Linux 6.14"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:46:04.217Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98689","references":[{"url":"https://git.kernel.org/stable/c/405a969c0b3356639116db89ab367be1d64b77c0"},{"url":"https://git.kernel.org/stable/c/2c2fd6a7fd5e1218db7e17336fc1a0393b6949e6"},{"url":"https://git.kernel.org/stable/c/419fa32fa5bc2d7fb9d0d15d5630b1c1090808b3"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.527Z","slug":"CVE-2026-98689","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Don't access a DP tunnel after its DPRX read was canceled\n\ntb_dp_dprx_work() checks ->dprx_canceled before it takes tb->lock so it\nmisses a tb_dp_dprx_stop() that could not cancel the already running\nwork. It then polls the DPRX capabilities and runs the callback for a\ntunnel that has already been torn down while the domain is suspending or\ngoing away.\n\nThis can be hit by cancelling the DPRX read from outside the ordered\ntb->wq: During suspend tb_disconnect_and_release_dp() does just this and\nwith a later patch tb_stop() will do it as well. The latter in combination\nwith the Apple NHI where the DPRX read never completed is how I hit\nthis.\n\nCheck the flag with tb->lock held instead and check it again in\ntb_dp_tunnel_active() because the callback runs after the lock has been\ndropped again.\n\nAlso clear the flag in tb_dp_dprx_start() so that it only ever describes\nthe work that is currently in flight.\n\n## Affected\n\n- `Linux >= d6d458d42e1e1544a18f37f1d5c840e00d5261b9 < 405a969c0b3356639116db89ab367be1d64b77c0`\n- `Linux >= d6d458d42e1e1544a18f37f1d5c840e00d5261b9 < 2c2fd6a7fd5e1218db7e17336fc1a0393b6949e6`\n- `Linux >= d6d458d42e1e1544a18f37f1d5c840e00d5261b9 < 419fa32fa5bc2d7fb9d0d15d5630b1c1090808b3`\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":[]}