CVE-2026-74575

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74575", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.917Z", "datePublished": "2026-08-15T12:28:13.187Z", "dateUpdated": "2026-10-16T19:05:57.276Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-23T12:47:35.374Z"}, "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - XDomain discovery packets reach the kernel over the Thunderbolt/USB4 control channel from a connected peer (adjacent host, dock, or inline device) on the shared physical link; no remote IP/network service is involved, but the attacker need not touch the victim chassis if they control the far end of an established TB connection.\nAC:L - The bug is a race between system_wq request handling and disconnect teardown; the peer attacker controls both sides by sending PROPERTIES_CHANGED, UUID, or LINK_STATE_CHANGE requests while forcing unplug/disconnect and can retry timing until delayed work is queued after cancel_delayed_work_sync().\nPR:N - No local account, capability, or root on the victim is required; any malicious or compromised Thunderbolt XDomain peer that can exchange discovery control-plane packets can trigger the vulnerable queue_delayed_work() paths without OS authentication.\nUI:N - During an active XDomain session the peer can send the triggering requests and force link teardown without any further victim action at exploit time; no additional mount, login, or sysfs operation is needed beyond the already-established Thunderbolt link.\nS:U - Impact is kernel heap use-after-free and memory corruption within kernel context; it does not directly cross VM, container, or IOMMU boundaries, though successful exploitation can yield standard local privilege escalation.\nC:H - Use-after-free on struct tb_xdomain lets attacker-influenced delayed work read freed kernel memory, enabling arbitrary kernel information disclosure and kernel pointer leaks that support further exploitation of the corruption primitive.\nI:H - Delayed work on the freed xdomain executes handshake state transitions, property/link updates, and hardware operations on attacker-reclaimed memory, enabling heap grooming and control-flow hijack for arbitrary kernel write/code execution.\nA:H - Accessing freed tb_xdomain via state_work or properties_changed_work causes kernel oops/panic or hang during disconnect, and a peer can repeat disconnect/request storms to deny Thunderbolt/XDomain services."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thunderbolt/xdomain.c", "include/linux/thunderbolt.h"], "versions": [{"version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "d4fa0d544c04dea636bf821ff5582cd7d63e2c34", "status": "affected", "versionType": "git"}, {"version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "cfbd2dba3d862c9be8c92bea2a357d9ed828a54a", "status": "affected", "versionType": "git"}, {"version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "dc11d5118f9da6ea28487ffe055de5a0d0734125", "status": "affected", "versionType": "git"}, {"version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "91b40862a02000f490b63f1d315be3ee31e83871", "status": "affected", "versionType": "git"}, {"version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "33c0ee18cf8665c974b00f4e0ba769fbc07efe10", "status": "affected", "versionType": "git"}, {"version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "54a62153c765cd24239cde1f2633f2a2fd005368", "status": "affected", "versionType": "git"}, {"version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91", "status": "affected", "versionType": "git"}, {"version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "2c5d2d3c3f70cde2565d7b279b544893a2035842", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thunderbolt/xdomain.c", "include/linux/thunderbolt.h"], "versions": [{"version": "5.2", "status": "affected"}, {"version": "0", "lessThan": "5.2", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.266", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.217", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.184", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.10.266"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.15.217"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.1.184"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.6.151"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.12.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.18.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d4fa0d544c04dea636bf821ff5582cd7d63e2c34"}, {"url": "https://git.kernel.org/stable/c/cfbd2dba3d862c9be8c92bea2a357d9ed828a54a"}, {"url": "https://git.kernel.org/stable/c/dc11d5118f9da6ea28487ffe055de5a0d0734125"}, {"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"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74575", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T19:00:47.186848Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:05:57.276Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74575", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T19:00:47.186848Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:00:48.201Z"}}], "cna": {"title": "thunderbolt: Prevent XDomain delayed work use-after-free on disconnect", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:A - XDomain discovery packets reach the kernel over the Thunderbolt/USB4 control channel from a connected peer (adjacent host, dock, or inline device) on the shared physical link; no remote IP/network service is involved, but the attacker need not touch the victim chassis if they control the far end of an established TB connection.\nAC:L - The bug is a race between system_wq request handling and disconnect teardown; the peer attacker controls both sides by sending PROPERTIES_CHANGED, UUID, or LINK_STATE_CHANGE requests while forcing unplug/disconnect and can retry timing until delayed work is queued after cancel_delayed_work_sync().\nPR:N - No local account, capability, or root on the victim is required; any malicious or compromised Thunderbolt XDomain peer that can exchange discovery control-plane packets can trigger the vulnerable queue_delayed_work() paths without OS authentication.\nUI:N - During an active XDomain session the peer can send the triggering requests and force link teardown without any further victim action at exploit time; no additional mount, login, or sysfs operation is needed beyond the already-established Thunderbolt link.\nS:U - Impact is kernel heap use-after-free and memory corruption within kernel context; it does not directly cross VM, container, or IOMMU boundaries, though successful exploitation can yield standard local privilege escalation.\nC:H - Use-after-free on struct tb_xdomain lets attacker-influenced delayed work read freed kernel memory, enabling arbitrary kernel information disclosure and kernel pointer leaks that support further exploitation of the corruption primitive.\nI:H - Delayed work on the freed xdomain executes handshake state transitions, property/link updates, and hardware operations on attacker-reclaimed memory, enabling heap grooming and control-flow hijack for arbitrary kernel write/code execution.\nA:H - Accessing freed tb_xdomain via state_work or properties_changed_work causes kernel oops/panic or hang during disconnect, and a peer can repeat disconnect/request storms to deny Thunderbolt/XDomain services."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "d4fa0d544c04dea636bf821ff5582cd7d63e2c34", "versionType": "git"}, {"status": "affected", "version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "cfbd2dba3d862c9be8c92bea2a357d9ed828a54a", "versionType": "git"}, {"status": "affected", "version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "dc11d5118f9da6ea28487ffe055de5a0d0734125", "versionType": "git"}, {"status": "affected", "version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "91b40862a02000f490b63f1d315be3ee31e83871", "versionType": "git"}, {"status": "affected", "version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "33c0ee18cf8665c974b00f4e0ba769fbc07efe10", "versionType": "git"}, {"status": "affected", "version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "54a62153c765cd24239cde1f2633f2a2fd005368", "versionType": "git"}, {"status": "affected", "version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91", "versionType": "git"}, {"status": "affected", "version": "559c1e1e013437bf190469efbcbd8bc803285853", "lessThan": "2c5d2d3c3f70cde2565d7b279b544893a2035842", "versionType": "git"}], "programFiles": ["drivers/thunderbolt/xdomain.c", "include/linux/thunderbolt.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.2"}, {"status": "unaffected", "version": "0", "lessThan": "5.2", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.266", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.217", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.184", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.151", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.103", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.44", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.8", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/thunderbolt/xdomain.c", "include/linux/thunderbolt.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/d4fa0d544c04dea636bf821ff5582cd7d63e2c34"}, {"url": "https://git.kernel.org/stable/c/cfbd2dba3d862c9be8c92bea2a357d9ed828a54a"}, {"url": "https://git.kernel.org/stable/c/dc11d5118f9da6ea28487ffe055de5a0d0734125"}, {"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"}], "x_generator": {"engine": "bippy-1.2.0"}, "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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.266", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.217", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.184", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.151", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.103", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.44", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.8", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "5.2"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-23T12:47:35.374Z"}}}, "cveMetadata": {"cveId": "CVE-2026-74575", "state": "PUBLISHED", "dateUpdated": "2026-10-16T19:05:57.276Z", "dateReserved": "2026-08-15T05:44:03.917Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T12:28:13.187Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"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": "d4fa0d544c04dea636bf821ff5582cd7d63e2c34", "status": "affected", "version": "559c1e1e013437bf190469efbcbd8bc803285853", "versionType": "git"}, {"lessThan": "cfbd2dba3d862c9be8c92bea2a357d9ed828a54a", "status": "affected", "version": "559c1e1e013437bf190469efbcbd8bc803285853", "versionType": "git"}, {"lessThan": "dc11d5118f9da6ea28487ffe055de5a0d0734125", "status": "affected", "version": "559c1e1e013437bf190469efbcbd8bc803285853", "versionType": "git"}, {"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": "5.10.*", "status": "unaffected", "version": "5.10.266", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.217", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.184", "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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-74575", "lastModified": "2026-10-16T20:17:39.063", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74575", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T19:00:47.186848Z", "version": "2.0.3"}}]}, "published": "2026-08-15T13:18:03.173", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2c5d2d3c3f70cde2565d7b279b544893a2035842"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/33c0ee18cf8665c974b00f4e0ba769fbc07efe10"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/54a62153c765cd24239cde1f2633f2a2fd005368"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/91b40862a02000f490b63f1d315be3ee31e83871"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cfbd2dba3d862c9be8c92bea2a357d9ed828a54a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d4fa0d544c04dea636bf821ff5582cd7d63e2c34"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc11d5118f9da6ea28487ffe055de5a0d0734125"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: thunderbolt: Prevent XDomain delayed work use-after-free on disconnect", "id": "2516994", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516994"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-364", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nthunderbolt: Prevent XDomain delayed work use-after-free on disconnect\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.\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.\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.", "A flaw was found in the Thunderbolt XDomain driver of the Linux kernel. A race condition can occur during the removal of a Thunderbolt cross-domain device (XDomain). This allows a delayed work item to be queued after its cancellation but before the XDomain object is freed, leading to a use-after-free vulnerability. This issue could result in system instability or a denial of service (DoS)."], "name": "CVE-2026-74575", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74575\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74575\nhttps://lore.kernel.org/linux-cve-announce/2026081555-CVE-2026-74575-34d7@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[559c1e1e013437bf190469efbcbd8bc803285853,91b40862a02000f490b63f1d315be3ee31e83871)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[559c1e1e013437bf190469efbcbd8bc803285853,33c0ee18cf8665c974b00f4e0ba769fbc07efe10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[559c1e1e013437bf190469efbcbd8bc803285853,54a62153c765cd24239cde1f2633f2a2fd005368)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[559c1e1e013437bf190469efbcbd8bc803285853,2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[559c1e1e013437bf190469efbcbd8bc803285853,2c5d2d3c3f70cde2565d7b279b544893a2035842)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.151,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.103,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.44,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T15:00:04.339314+00:00", "updated": "2026-08-22T03:45:03.673591+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}