CVE-2026-98693

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98693", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.364Z", "datePublished": "2026-10-18T15:46:17.742Z", "dateUpdated": "2026-10-19T09:24:03.100Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:24:03.100Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Hold a router reference for each allocated HopID\n\ntb_stop() drops the reference to all DP tunnels but does not deactivate\nthem, thus nothing cancels a dprx_work still in flight (which holds its\nown tunnel reference) and the tunnel can outlive tb_switch_remove(). The\nHopID releases in tb_path_free() then operate on freed IDAs and trigger\nwarnings like\n\n ida_free called for id=8 which is not allocated.\n\nThis can be triggered by unbinding the driver while a DP tunnel is still\nwaiting for the DPRX capabilities read to finish. On the Apple NHI\nunplugging the cable runs into just that reliably because the read can\nnever finish right now and because the unplug powers down the entire\nUSB4 complex and removes the NHI device.\n\nTake a router reference whenever an input or output HopID is allocated\nand drop it again after the HopID is released. This keeps the ports and\ntheir HopID IDAs alive for as long as they are used.\n\nThe KUnit tests allocate routers without ever registering their devices\nso initialize the embedded struct device there as well and drop its\ninitial reference when the test is finished."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thunderbolt/switch.c", "drivers/thunderbolt/test.c"], "versions": [{"version": "d6d458d42e1e1544a18f37f1d5c840e00d5261b9", "lessThan": "c444d2c17dc236680324fd989232199680a6c419", "status": "affected", "versionType": "git"}, {"version": "d6d458d42e1e1544a18f37f1d5c840e00d5261b9", "lessThan": "2b5f976119d8f099a03cbf700df3d9c8690fe33d", "status": "affected", "versionType": "git"}, {"version": "d6d458d42e1e1544a18f37f1d5c840e00d5261b9", "lessThan": "032c59c7681c661b63123231824170c025afb7e7", "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/switch.c", "drivers/thunderbolt/test.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.56", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.14", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c444d2c17dc236680324fd989232199680a6c419"}, {"url": "https://git.kernel.org/stable/c/2b5f976119d8f099a03cbf700df3d9c8690fe33d"}, {"url": "https://git.kernel.org/stable/c/032c59c7681c661b63123231824170c025afb7e7"}], "title": "thunderbolt: Hold a router reference for each allocated HopID", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/thunderbolt/switch.c", "drivers/thunderbolt/test.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c444d2c17dc236680324fd989232199680a6c419", "status": "affected", "version": "d6d458d42e1e1544a18f37f1d5c840e00d5261b9", "versionType": "git"}, {"lessThan": "2b5f976119d8f099a03cbf700df3d9c8690fe33d", "status": "affected", "version": "d6d458d42e1e1544a18f37f1d5c840e00d5261b9", "versionType": "git"}, {"lessThan": "032c59c7681c661b63123231824170c025afb7e7", "status": "affected", "version": "d6d458d42e1e1544a18f37f1d5c840e00d5261b9", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/thunderbolt/switch.c", "drivers/thunderbolt/test.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.56", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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: Hold a router reference for each allocated HopID\n\ntb_stop() drops the reference to all DP tunnels but does not deactivate\nthem, thus nothing cancels a dprx_work still in flight (which holds its\nown tunnel reference) and the tunnel can outlive tb_switch_remove(). The\nHopID releases in tb_path_free() then operate on freed IDAs and trigger\nwarnings like\n\n ida_free called for id=8 which is not allocated.\n\nThis can be triggered by unbinding the driver while a DP tunnel is still\nwaiting for the DPRX capabilities read to finish. On the Apple NHI\nunplugging the cable runs into just that reliably because the read can\nnever finish right now and because the unplug powers down the entire\nUSB4 complex and removes the NHI device.\n\nTake a router reference whenever an input or output HopID is allocated\nand drop it again after the HopID is released. This keeps the ports and\ntheir HopID IDAs alive for as long as they are used.\n\nThe KUnit tests allocate routers without ever registering their devices\nso initialize the embedded struct device there as well and drop its\ninitial reference when the test is finished."}], "id": "CVE-2026-98693", "lastModified": "2026-10-19T10:19:33.640", "metrics": {}, "published": "2026-10-18T16:17:22.727", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/032c59c7681c661b63123231824170c025afb7e7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b5f976119d8f099a03cbf700df3d9c8690fe33d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c444d2c17dc236680324fd989232199680a6c419"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: thunderbolt: Hold a router reference for each allocated HopID", "id": "2555174", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555174"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nthunderbolt: Hold a router reference for each allocated HopID\ntb_stop() drops the reference to all DP tunnels but does not deactivate\nthem, thus nothing cancels a dprx_work still in flight (which holds its\nown tunnel reference) and the tunnel can outlive tb_switch_remove(). The\nHopID releases in tb_path_free() then operate on freed IDAs and trigger\nwarnings like\nida_free called for id=8 which is not allocated.\nThis can be triggered by unbinding the driver while a DP tunnel is still\nwaiting for the DPRX capabilities read to finish. On the Apple NHI\nunplugging the cable runs into just that reliably because the read can\nnever finish right now and because the unplug powers down the entire\nUSB4 complex and removes the NHI device.\nTake a router reference whenever an input or output HopID is allocated\nand drop it again after the HopID is released. This keeps the ports and\ntheir HopID IDAs alive for as long as they are used.\nThe KUnit tests allocate routers without ever registering their devices\nso initialize the embedded struct device there as well and drop its\ninitial reference when the test is finished.", "A flaw was found in the Linux kernel's Thunderbolt driver. A physically proximate user or local attacker could trigger a Denial of Service (DoS) and crash the system by disconnecting a device or unbinding the driver while DisplayPort tunnel operations are still active. This issue occurs because the driver fails to maintain proper router reference counts during connection routing, allowing device structures to be freed prematurely while background tasks are still running. When the remaining tasks complete, cleanup operations attempt to access already freed memory, leading to memory corruption and kernel instability."], "name": "CVE-2026-98693", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98693\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98693\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98693.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d6d458d42e1e1544a18f37f1d5c840e00d5261b9,c444d2c17dc236680324fd989232199680a6c419)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d6d458d42e1e1544a18f37f1d5c840e00d5261b9,2b5f976119d8f099a03cbf700df3d9c8690fe33d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d6d458d42e1e1544a18f37f1d5c840e00d5261b9,032c59c7681c661b63123231824170c025afb7e7)"}}], "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": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.56,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc6,*]"}}], "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": "2026-10-18T20:00:12.043658+00:00", "updated": "2026-10-23T06:45:07.459125+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}