CVE-2026-64463 (GCVE-0-2026-64463)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-08-05 12:42
VLAI
Title
usb: typec: tcpci_rt1711h: unregister TCPCI port with devres
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpci_rt1711h: unregister TCPCI port with devres rt1711h_probe() registers the TCPCI port before requesting the interrupt and enabling alert interrupts. If either of those later steps fails, the probe function returns without unregistering the TCPCI port. The explicit unregister currently only happens from the remove callback. Register a devres action immediately after tcpci_register_port() succeeds, so tcpci_unregister_port() runs on later probe failures and on driver detach. Drop the remove callback to avoid unregistering the same port twice. This issue was identified during our ongoing static-analysis research while reviewing kernel code.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 302c570bf36e997d55ad0d60628a2feec76954a4 , < ce2e36e8759dfbfe546723810c306f42f484866d (git)
Affected: 302c570bf36e997d55ad0d60628a2feec76954a4 , < 94b1abf1af94aa5a355e9f03675e07bccfc41c4b (git)
Affected: 302c570bf36e997d55ad0d60628a2feec76954a4 , < e5406c8fb71cd2f89a46300a746f6e7972e621e8 (git)
Affected: 302c570bf36e997d55ad0d60628a2feec76954a4 , < 569f18a83eed0b0be4615f0c7bed40fb5c50e2e6 (git)
Affected: 302c570bf36e997d55ad0d60628a2feec76954a4 , < e8da46d99d3710106e7c44db14566bf9b57386b5 (git)
Affected: 4309ab96ab744703871e35d829177dd9347bf643 (git)
Affected: 895ec8c86e13f85b119c71d5f95491b48867955e (git)
Affected: 745dcedb896a740825160228f98dbb5725a49f85 (git)
Affected: 4.19.131 , < 4.20 (semver)
Affected: 5.4.50 , < 5.5 (semver)
Affected: 5.7.7 , < 5.8 (semver)
Create a notification for this product.
Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
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          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/tcpm/tcpci_rt1711h.c"
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          "vendor": "Linux",
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              "version": "0",
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              "status": "unaffected",
              "version": "7.2-rc3",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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          "nodes": [
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                  "versionStartIncluding": "5.8",
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                {
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      "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
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              "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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:42:19.410Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/ce2e36e8759dfbfe546723810c306f42f484866d"
        },
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          "url": "https://git.kernel.org/stable/c/94b1abf1af94aa5a355e9f03675e07bccfc41c4b"
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        },
        {
          "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64463",
    "datePublished": "2026-07-25T08:51:29.720Z",
    "dateReserved": "2026-07-19T15:36:31.789Z",
    "dateUpdated": "2026-08-05T12:42:19.410Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64463",
      "date": "2026-08-10",
      "epss": "0.00138",
      "percentile": "0.0361"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-27T14:46:29.000Z",
      "cve": "CVE-2026-64463",
      "id": "msrc_CVE-2026-64463",
      "initial_release_date": "2026-07-26T01:04:21.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "usb: typec: tcpci_rt1711h: unregister TCPCI port with devres",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64463.json",
      "version": "2"
    },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T00:22:21+00:00",
      "cve": "CVE-2026-64463",
      "id": "CVE-2026-64463",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:known_affected": "48",
      "product_status:known_not_affected": "226",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: typec: tcpci_rt1711h: unregister TCPCI port with devres",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64463.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.