CVE-2026-98688

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98688", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.364Z", "datePublished": "2026-10-18T15:46:02.231Z", "dateUpdated": "2026-10-19T09:23:58.312Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:23:58.312Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Fix NULL dereference in tb_remove_work()\n\nThere is a slight race between tb_remove_work() and tb_domain_remove()\nwhich leads to dereferencing a NULL tb->root_switch pointer inside\ntb_free_unplugged_xdomains():\n\n Thread A Thread B\n\n tb_remove_work()\n tb_domain_remove()\n mutex_lock(&tb->lock)\n tb_stop()\n /* doesn't cancel a running callback */\n cancel_delayed_work(&tcm->remove_work)\n ...\n tb_switch_remove(tb->root_switch)\n tb->root_switch = NULL\n mutex_unlock(&tb->lock)\n mutex_lock(&tb->lock)\n ...\n /* without checking ->root_switch */\n tb_free_unplugged_xdomains(tb->root_switch)\n mutex_unlock(&tb->lock)\n\nCommit a8937f35cf39 (\"thunderbolt: Remove XDomain from the bus without\nholding tb->lock\") doesn't seem right to move tb_free_unplugged_xdomains()\nout of the &tb->lock section and the check for tb->root_switch, in\nparticular. It states:\n\n For this reason separate removing the XDomain from the topology data\n structures (where we need the lock) from unregistering the device from\n the bus (where remove callbacks of the drivers are being called).\n\ntb_free_unplugged_xdomains() belongs to the former group of functions\nrequiring the lock. And it also calls tb_xdomain_remove() which should\nonly be called with &tb->lock held.\n\nFound by Linux Verification Center (linuxtesting.org) with Svace static\nanalysis tool."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thunderbolt/tb.c"], "versions": [{"version": "a8937f35cf39c39c64325aa84d0463d866850857", "lessThan": "2f4cd43faa9d6470b30a9fbcbac6584db8108c1f", "status": "affected", "versionType": "git"}, {"version": "a8937f35cf39c39c64325aa84d0463d866850857", "lessThan": "4310c6b8e75d6a47f7548e5948fbe6318aa4440a", "status": "affected", "versionType": "git"}, {"version": "3e9e823810b9a51f0bee9ed6e3d90df70484ff8d", "status": "affected", "versionType": "git"}, {"version": "9363cd4977260bf7f211feee54f85858bba2320c", "status": "affected", "versionType": "git"}, {"version": "5.10.266", "lessThan": "5.11", "status": "affected", "versionType": "semver"}, {"version": "5.15.217", "lessThan": "5.16", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thunderbolt/tb.c"], "versions": [{"version": "7.2", "status": "affected"}, {"version": "0", "lessThan": "7.2", "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": "7.2", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.2", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.266"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.217"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2f4cd43faa9d6470b30a9fbcbac6584db8108c1f"}, {"url": "https://git.kernel.org/stable/c/4310c6b8e75d6a47f7548e5948fbe6318aa4440a"}], "title": "thunderbolt: Fix NULL dereference in tb_remove_work()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/thunderbolt/tb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2f4cd43faa9d6470b30a9fbcbac6584db8108c1f", "status": "affected", "version": "a8937f35cf39c39c64325aa84d0463d866850857", "versionType": "git"}, {"lessThan": "4310c6b8e75d6a47f7548e5948fbe6318aa4440a", "status": "affected", "version": "a8937f35cf39c39c64325aa84d0463d866850857", "versionType": "git"}, {"status": "affected", "version": "3e9e823810b9a51f0bee9ed6e3d90df70484ff8d", "versionType": "git"}, {"status": "affected", "version": "9363cd4977260bf7f211feee54f85858bba2320c", "versionType": "git"}, {"lessThan": "5.11", "status": "affected", "version": "5.10.266", "versionType": "semver"}, {"lessThan": "5.16", "status": "affected", "version": "5.15.217", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/thunderbolt/tb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.2"}, {"lessThan": "7.2", "status": "unaffected", "version": "0", "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: Fix NULL dereference in tb_remove_work()\n\nThere is a slight race between tb_remove_work() and tb_domain_remove()\nwhich leads to dereferencing a NULL tb->root_switch pointer inside\ntb_free_unplugged_xdomains():\n\n Thread A Thread B\n\n tb_remove_work()\n tb_domain_remove()\n mutex_lock(&tb->lock)\n tb_stop()\n /* doesn't cancel a running callback */\n cancel_delayed_work(&tcm->remove_work)\n ...\n tb_switch_remove(tb->root_switch)\n tb->root_switch = NULL\n mutex_unlock(&tb->lock)\n mutex_lock(&tb->lock)\n ...\n /* without checking ->root_switch */\n tb_free_unplugged_xdomains(tb->root_switch)\n mutex_unlock(&tb->lock)\n\nCommit a8937f35cf39 (\"thunderbolt: Remove XDomain from the bus without\nholding tb->lock\") doesn't seem right to move tb_free_unplugged_xdomains()\nout of the &tb->lock section and the check for tb->root_switch, in\nparticular. It states:\n\n For this reason separate removing the XDomain from the topology data\n structures (where we need the lock) from unregistering the device from\n the bus (where remove callbacks of the drivers are being called).\n\ntb_free_unplugged_xdomains() belongs to the former group of functions\nrequiring the lock. And it also calls tb_xdomain_remove() which should\nonly be called with &tb->lock held.\n\nFound by Linux Verification Center (linuxtesting.org) with Svace static\nanalysis tool."}], "id": "CVE-2026-98688", "lastModified": "2026-10-19T10:19:33.190", "metrics": {}, "published": "2026-10-18T16:17:22.207", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2f4cd43faa9d6470b30a9fbcbac6584db8108c1f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4310c6b8e75d6a47f7548e5948fbe6318aa4440a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: thunderbolt: Fix NULL dereference in tb_remove_work()", "id": "2555095", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555095"}, "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-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nthunderbolt: Fix NULL dereference in tb_remove_work()\nThere is a slight race between tb_remove_work() and tb_domain_remove()\nwhich leads to dereferencing a NULL tb->root_switch pointer inside\ntb_free_unplugged_xdomains():\nThread A Thread B\ntb_remove_work()\ntb_domain_remove()\nmutex_lock(&tb->lock)\ntb_stop()\n/* doesn't cancel a running callback */\ncancel_delayed_work(&tcm->remove_work)\n...\ntb_switch_remove(tb->root_switch)\ntb->root_switch = NULL\nmutex_unlock(&tb->lock)\nmutex_lock(&tb->lock)\n...\n/* without checking ->root_switch */\ntb_free_unplugged_xdomains(tb->root_switch)\nmutex_unlock(&tb->lock)\nCommit a8937f35cf39 (\"thunderbolt: Remove XDomain from the bus without\nholding tb->lock\") doesn't seem right to move tb_free_unplugged_xdomains()\nout of the &tb->lock section and the check for tb->root_switch, in\nparticular. It states:\nFor this reason separate removing the XDomain from the topology data\nstructures (where we need the lock) from unregistering the device from\nthe bus (where remove callbacks of the drivers are being called).\ntb_free_unplugged_xdomains() belongs to the former group of functions\nrequiring the lock. And it also calls tb_xdomain_remove() which should\nonly be called with &tb->lock held.\nFound by Linux Verification Center (linuxtesting.org) with Svace static\nanalysis tool.", "A flaw was found in the Linux kernel's Thunderbolt subsystem. A race condition during device removal operations can lead to a NULL pointer dereference. A local user could exploit this timing issue during device disconnection to trigger a kernel crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-98688", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "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": "Not affected", "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": "Not affected", "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-2026-98688\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98688\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98688.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a8937f35cf39c39c64325aa84d0463d866850857,2f4cd43faa9d6470b30a9fbcbac6584db8108c1f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a8937f35cf39c39c64325aa84d0463d866850857,4310c6b8e75d6a47f7548e5948fbe6318aa4440a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "3e9e823810b9a51f0bee9ed6e3d90df70484ff8d"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "9363cd4977260bf7f211feee54f85858bba2320c"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.10.266,5.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.15.217,5.16)"}}], "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": "7.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "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": "2026-10-18T22:30:13.855028+00:00", "updated": "2026-10-22T21:45:06.441274+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}