CVE-2026-64463

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The explicit\nunregister currently only happens from the remove callback.\n\nRegister a devres action immediately after tcpci_register_port() succeeds,\nso tcpci_unregister_port() runs on later probe failures and on driver\ndetach. Drop the remove callback to avoid unregistering the same port\ntwice.\n\nThis issue was identified during our ongoing static-analysis research while\nreviewing kernel code."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable probe and failed-resource-unwind path is locally reachable through driver activation and locally induced resource pressure; it is not a network-facing protocol path.\nAC:L - Once a post-registration operation fails, TCPM deterministically leaves queued work and a delayed timer referencing freed memory, so exploitation does not require winning an uncontrolled race.\nPR:L - A basic local user can apply resource pressure and groom the freed kernel heap, while no capability or authentication check protects the asynchronous worker and timer paths.\nUI:N - The driver core, TCPM worker, and timer execute automatically without requiring another user to perform an action.\nS:U - The vulnerable driver and resulting kernel-memory impact remain within the host kernel security authority, with no demonstrated VM, IOMMU, or sandbox boundary crossing.\nC:H - The freed pointer-rich TCPM object can be reclaimed with attacker-influenced data, enabling kernel-memory dereferences and potentially arbitrary information disclosure.\nI:H - The freed object contains active hrtimers, work items, and TCPC operation pointers, making heap reuse potentially exploitable for arbitrary writes or control-flow hijacking.\nA:H - Queued work or timer expiry accesses the freed TCPM object and can reliably cause an oops, panic, timer corruption, or persistent system hang."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/typec/tcpm/tcpci_rt1711h.c"], "versions": [{"version": 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"https://git.kernel.org/stable/c/94b1abf1af94aa5a355e9f03675e07bccfc41c4b"}, {"url": "https://git.kernel.org/stable/c/e5406c8fb71cd2f89a46300a746f6e7972e621e8"}, {"url": "https://git.kernel.org/stable/c/569f18a83eed0b0be4615f0c7bed40fb5c50e2e6"}, {"url": "https://git.kernel.org/stable/c/e8da46d99d3710106e7c44db14566bf9b57386b5"}], "title": "usb: typec: tcpci_rt1711h: unregister TCPCI port with devres", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64463", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:41:14.529944Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-401", "description": "CWE-401 Missing Release of Memory after Effective Lifetime"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", 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If either of those later steps fails, the\nprobe function returns without unregistering the TCPCI port. The explicit\nunregister currently only happens from the remove callback.\n\nRegister a devres action immediately after tcpci_register_port() succeeds,\nso tcpci_unregister_port() runs on later probe failures and on driver\ndetach. Drop the remove callback to avoid unregistering the same port\ntwice.\n\nThis issue was identified during our ongoing static-analysis research while\nreviewing kernel code."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.96", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.39", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.4", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.19.131"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.4.50"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.7.7"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:56:08.330Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64463", "state": "PUBLISHED", "dateUpdated": "2026-10-19T20:38:30.882Z", "dateReserved": "2026-07-19T15:36:31.789Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-25T08:51:29.720Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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"cpe:2.3:o:linux:linux_kernel:5.8:rc5:*:*:*:*:*:*", "matchCriteriaId": "5F813669-CB80-4A17-9141-F3A4FA98CA13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.8:rc6:*:*:*:*:*:*", "matchCriteriaId": "69E12239-342D-43B2-93F0-2760623AFEEF", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.8:rc7:*:*:*:*:*:*", "matchCriteriaId": "CA1501B4-945A-45C2-8E7C-65085BF91C76", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:*", "matchCriteriaId": "5E8B9085-7ADB-4A05-89EF-12949B6A0509", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:*", "matchCriteriaId": "1FC0D50D-9D58-4947-A197-A5A3FF07E7E3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: tcpci_rt1711h: unregister TCPCI port with devres\n\nrt1711h_probe() registers the TCPCI port before requesting the interrupt\nand enabling alert interrupts. If either of those later steps fails, the\nprobe function returns without unregistering the TCPCI port. The explicit\nunregister currently only happens from the remove callback.\n\nRegister a devres action immediately after tcpci_register_port() succeeds,\nso tcpci_unregister_port() runs on later probe failures and on driver\ndetach. Drop the remove callback to avoid unregistering the same port\ntwice.\n\nThis issue was identified during our ongoing static-analysis research while\nreviewing kernel code."}], "id": "CVE-2026-64463", "lastModified": "2026-11-12T20:34:20.143", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64463", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:41:14.529944Z", "version": "2.0.3"}}]}, "published": "2026-07-25T10:17:31.543", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/388f5354158fc038214b73baad43a723385fea1e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/569f18a83eed0b0be4615f0c7bed40fb5c50e2e6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/94b1abf1af94aa5a355e9f03675e07bccfc41c4b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ce2e36e8759dfbfe546723810c306f42f484866d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e5406c8fb71cd2f89a46300a746f6e7972e621e8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e8da46d99d3710106e7c44db14566bf9b57386b5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: usb: typec: tcpci_rt1711h: unregister TCPCI port with devres", "id": "2507063", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507063"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-459", "details": ["A flaw was found in the Linux kernel's USB Type-C subsystem, specifically within the `tcpci_rt1711h` driver. When a USB Type-C port is initialized, the system may fail to properly unregister the port if certain setup steps do not complete successfully. This oversight in resource management could lead to system instability or a denial of service (DoS), where legitimate users are unable to access system resources."], "name": "CVE-2026-64463", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "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"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64463\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64463\nhttps://lore.kernel.org/linux-cve-announce/2026072544-CVE-2026-64463-1ce0@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[302c570bf36e997d55ad0d60628a2feec76954a4,ce2e36e8759dfbfe546723810c306f42f484866d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[302c570bf36e997d55ad0d60628a2feec76954a4,94b1abf1af94aa5a355e9f03675e07bccfc41c4b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[302c570bf36e997d55ad0d60628a2feec76954a4,e5406c8fb71cd2f89a46300a746f6e7972e621e8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[302c570bf36e997d55ad0d60628a2feec76954a4,e8da46d99d3710106e7c44db14566bf9b57386b5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[302c570bf36e997d55ad0d60628a2feec76954a4,4309ab96ab744703871e35d829177dd9347bf643)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "4309ab96ab744703871e35d829177dd9347bf643"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "895ec8c86e13f85b119c71d5f95491b48867955e"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "745dcedb896a740825160228f98dbb5725a49f85"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.19.131,4.20)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.50,5.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.7.7,5.8)"}}], "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": "semver", "value": "5.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.145,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.96,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.39,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.4,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc3,*]"}}], "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": "2026-07-25T19:30:03.947305+00:00", "updated": "2026-08-02T12:45:06.520799+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-401", "CWE-459"]}