{"api_version":"1","generated_at":"2026-08-16T06:01:17+00:00","cve":"CVE-2026-74575","urls":{"html":"https://cve.report/CVE-2026-74575","api":"https://cve.report/api/cve/CVE-2026-74575.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74575","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74575"},"summary":{"title":"thunderbolt: Prevent XDomain delayed work use-after-free on disconnect","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Prevent XDomain delayed work use-after-free on disconnect\n\ntb_xdp_handle_request() runs on system_wq and queues\nxd->state_work via queue_delayed_work() in three request handlers:\nPROPERTIES_CHANGED_REQUEST, UUID_REQUEST (via start_handshake),\nand LINK_STATE_CHANGE_REQUEST.  Similarly, update_xdomain() queues\nxd->properties_changed_work when local properties change.\n\nConcurrently, tb_xdomain_remove() calls stop_handshake() which does\ncancel_delayed_work_sync() on both delayed works.  Later,\ntb_xdomain_unregister() calls device_unregister() which eventually\nfrees the xdomain.  Since commit 559c1e1e0134 (\"thunderbolt: Run\ntb_xdp_handle_request() in system workqueue\") moved the request\nhandler off tb->wq, the handler and the remove path are no longer\nserialized.  If queue_delayed_work() executes after\ncancel_delayed_work_sync() but before the xdomain is freed, the\ndelayed work fires on a freed object.\n\nAdd xd->removing that tb_xdomain_remove() sets under xd->lock\nbefore calling stop_handshake().  Each external queue site holds\nthe same lock and checks removing before calling\nqueue_delayed_work().  This provides the mutual exclusion needed:\neither the queue site acquires the lock first and queues work that\nthe subsequent cancel will see, or the remove path acquires the\nlock first and the queue site observes removing == true and skips\nthe queue.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 13:18:03","updated_at":"2026-08-15 13:18:03"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/54a62153c765cd24239cde1f2633f2a2fd005368","name":"https://git.kernel.org/stable/c/54a62153c765cd24239cde1f2633f2a2fd005368","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2c5d2d3c3f70cde2565d7b279b544893a2035842","name":"https://git.kernel.org/stable/c/2c5d2d3c3f70cde2565d7b279b544893a2035842","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/91b40862a02000f490b63f1d315be3ee31e83871","name":"https://git.kernel.org/stable/c/91b40862a02000f490b63f1d315be3ee31e83871","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/33c0ee18cf8665c974b00f4e0ba769fbc07efe10","name":"https://git.kernel.org/stable/c/33c0ee18cf8665c974b00f4e0ba769fbc07efe10","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91","name":"https://git.kernel.org/stable/c/2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74575","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74575","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 559c1e1e013437bf190469efbcbd8bc803285853 91b40862a02000f490b63f1d315be3ee31e83871 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 559c1e1e013437bf190469efbcbd8bc803285853 33c0ee18cf8665c974b00f4e0ba769fbc07efe10 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 559c1e1e013437bf190469efbcbd8bc803285853 54a62153c765cd24239cde1f2633f2a2fd005368 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 559c1e1e013437bf190469efbcbd8bc803285853 2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 559c1e1e013437bf190469efbcbd8bc803285853 2c5d2d3c3f70cde2565d7b279b544893a2035842 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.2","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.151 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.103 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.44 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.8 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/thunderbolt/xdomain.c","include/linux/thunderbolt.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"91b40862a02000f490b63f1d315be3ee31e83871","status":"affected","version":"559c1e1e013437bf190469efbcbd8bc803285853","versionType":"git"},{"lessThan":"33c0ee18cf8665c974b00f4e0ba769fbc07efe10","status":"affected","version":"559c1e1e013437bf190469efbcbd8bc803285853","versionType":"git"},{"lessThan":"54a62153c765cd24239cde1f2633f2a2fd005368","status":"affected","version":"559c1e1e013437bf190469efbcbd8bc803285853","versionType":"git"},{"lessThan":"2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91","status":"affected","version":"559c1e1e013437bf190469efbcbd8bc803285853","versionType":"git"},{"lessThan":"2c5d2d3c3f70cde2565d7b279b544893a2035842","status":"affected","version":"559c1e1e013437bf190469efbcbd8bc803285853","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/thunderbolt/xdomain.c","include/linux/thunderbolt.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.2"},{"lessThan":"5.2","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.151","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.103","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.44","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.151","versionStartIncluding":"5.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.103","versionStartIncluding":"5.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.44","versionStartIncluding":"5.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.8","versionStartIncluding":"5.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"5.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Prevent XDomain delayed work use-after-free on disconnect\n\ntb_xdp_handle_request() runs on system_wq and queues\nxd->state_work via queue_delayed_work() in three request handlers:\nPROPERTIES_CHANGED_REQUEST, UUID_REQUEST (via start_handshake),\nand LINK_STATE_CHANGE_REQUEST.  Similarly, update_xdomain() queues\nxd->properties_changed_work when local properties change.\n\nConcurrently, tb_xdomain_remove() calls stop_handshake() which does\ncancel_delayed_work_sync() on both delayed works.  Later,\ntb_xdomain_unregister() calls device_unregister() which eventually\nfrees the xdomain.  Since commit 559c1e1e0134 (\"thunderbolt: Run\ntb_xdp_handle_request() in system workqueue\") moved the request\nhandler off tb->wq, the handler and the remove path are no longer\nserialized.  If queue_delayed_work() executes after\ncancel_delayed_work_sync() but before the xdomain is freed, the\ndelayed work fires on a freed object.\n\nAdd xd->removing that tb_xdomain_remove() sets under xd->lock\nbefore calling stop_handshake().  Each external queue site holds\nthe same lock and checks removing before calling\nqueue_delayed_work().  This provides the mutual exclusion needed:\neither the queue site acquires the lock first and queues work that\nthe subsequent cancel will see, or the remove path acquires the\nlock first and the queue site observes removing == true and skips\nthe queue."}],"providerMetadata":{"dateUpdated":"2026-08-15T12:28:13.187Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/91b40862a02000f490b63f1d315be3ee31e83871"},{"url":"https://git.kernel.org/stable/c/33c0ee18cf8665c974b00f4e0ba769fbc07efe10"},{"url":"https://git.kernel.org/stable/c/54a62153c765cd24239cde1f2633f2a2fd005368"},{"url":"https://git.kernel.org/stable/c/2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91"},{"url":"https://git.kernel.org/stable/c/2c5d2d3c3f70cde2565d7b279b544893a2035842"}],"title":"thunderbolt: Prevent XDomain delayed work use-after-free on disconnect","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74575","datePublished":"2026-08-15T12:28:13.187Z","dateReserved":"2026-08-15T05:44:03.917Z","dateUpdated":"2026-08-15T12:28:13.187Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 13:18:03","lastModifiedDate":"2026-08-15 13:18:03","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74575","Ordinal":"1","Title":"thunderbolt: Prevent XDomain delayed work use-after-free on disc","CVE":"CVE-2026-74575","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74575","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Prevent XDomain delayed work use-after-free on disconnect\n\ntb_xdp_handle_request() runs on system_wq and queues\nxd->state_work via queue_delayed_work() in three request handlers:\nPROPERTIES_CHANGED_REQUEST, UUID_REQUEST (via start_handshake),\nand LINK_STATE_CHANGE_REQUEST.  Similarly, update_xdomain() queues\nxd->properties_changed_work when local properties change.\n\nConcurrently, tb_xdomain_remove() calls stop_handshake() which does\ncancel_delayed_work_sync() on both delayed works.  Later,\ntb_xdomain_unregister() calls device_unregister() which eventually\nfrees the xdomain.  Since commit 559c1e1e0134 (\"thunderbolt: Run\ntb_xdp_handle_request() in system workqueue\") moved the request\nhandler off tb->wq, the handler and the remove path are no longer\nserialized.  If queue_delayed_work() executes after\ncancel_delayed_work_sync() but before the xdomain is freed, the\ndelayed work fires on a freed object.\n\nAdd xd->removing that tb_xdomain_remove() sets under xd->lock\nbefore calling stop_handshake().  Each external queue site holds\nthe same lock and checks removing before calling\nqueue_delayed_work().  This provides the mutual exclusion needed:\neither the queue site acquires the lock first and queues work that\nthe subsequent cancel will see, or the remove path acquires the\nlock first and the queue site observes removing == true and skips\nthe queue.","Type":"Description","Title":"thunderbolt: Prevent XDomain delayed work use-after-free on disc"}]}}}