CVE-2026-64337 (GCVE-0-2026-64337)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50
VLAI
Title
usb: mtu3: unmap request DMA on queue failure
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: mtu3: unmap request DMA on queue failure mtu3_gadget_queue() maps the request before checking whether the QMU GPD ring can accept another transfer. the request is returned with -EAGAIN before it is linked on the endpoint request list if mtu3_prepare_transfer() fails. Normal completion and dequeue paths unmap requests from mtu3_req_complete(), but this error path never reaches that helper, so the DMA mapping is left active. Unmap the request before returning from the failed queue path.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: df2069acb00569a6299d6e11aa1865eeba463848 , < 3cee30f1138281a1d247bb053a1ad4f7c5b04e98 (git)
Affected: df2069acb00569a6299d6e11aa1865eeba463848 , < f3c4026524d3660c73ef2838b99776d37631e039 (git)
Affected: df2069acb00569a6299d6e11aa1865eeba463848 , < e8f739a3860d043dcc135371637e82f53132efe5 (git)
Affected: df2069acb00569a6299d6e11aa1865eeba463848 , < 4183874b7925f4a98b400cf857bea26ee87da236 (git)
Affected: df2069acb00569a6299d6e11aa1865eeba463848 , < 00c3fef4c2dc2c7cbd8281f8fda09d1913420f09 (git)
Affected: df2069acb00569a6299d6e11aa1865eeba463848 , < 8c29d9cfab1c3cf0d0b7fcdf9255597be30aa3e1 (git)
Affected: df2069acb00569a6299d6e11aa1865eeba463848 , < 835b0596d4c9bdef93f842d8f826978fb4956b74 (git)
Affected: df2069acb00569a6299d6e11aa1865eeba463848 , < 0bddda5a11665c210339de76d27ebbd1a2e0b43c (git)
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Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (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)
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/mtu3/mtu3_gadget.c"
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "4.10"
            },
            {
              "lessThan": "4.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: mtu3: unmap request DMA on queue failure\n\nmtu3_gadget_queue() maps the request before checking whether\nthe QMU GPD ring can accept another transfer. the request is\nreturned with -EAGAIN before it is linked on the endpoint\nrequest list if mtu3_prepare_transfer() fails.\n\nNormal completion and dequeue paths unmap requests from\nmtu3_req_complete(), but this error path never reaches that\nhelper, so the DMA mapping is left active. Unmap the request\nbefore returning from the failed queue path."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:50:02.066Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3cee30f1138281a1d247bb053a1ad4f7c5b04e98"
        },
        {
          "url": "https://git.kernel.org/stable/c/f3c4026524d3660c73ef2838b99776d37631e039"
        },
        {
          "url": "https://git.kernel.org/stable/c/e8f739a3860d043dcc135371637e82f53132efe5"
        },
        {
          "url": "https://git.kernel.org/stable/c/4183874b7925f4a98b400cf857bea26ee87da236"
        },
        {
          "url": "https://git.kernel.org/stable/c/00c3fef4c2dc2c7cbd8281f8fda09d1913420f09"
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        },
        {
          "url": "https://git.kernel.org/stable/c/0bddda5a11665c210339de76d27ebbd1a2e0b43c"
        }
      ],
      "title": "usb: mtu3: unmap request DMA on queue failure",
      "x_generator": {
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64337",
    "datePublished": "2026-07-25T08:50:02.066Z",
    "dateReserved": "2026-07-19T15:36:31.781Z",
    "dateUpdated": "2026-07-25T08:50:02.066Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64337",
      "date": "2026-07-26",
      "epss": "0.00211",
      "percentile": "0.11449"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-26T01:09:18.000Z",
      "cve": "CVE-2026-64337",
      "id": "msrc_CVE-2026-64337",
      "initial_release_date": "2026-07-26T01:09:18.000Z",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "usb: mtu3: unmap request DMA on queue failure",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64337.json",
      "version": "1"
    },
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    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T16:01:33Z",
      "cve": "CVE-2026-64337",
      "id": "CVE-2026-64337",
      "initial_release_date": "2026-07-25T16:01:33Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64337",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64337.json",
      "version": "2"
    }
  }
}



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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

Author Source Type Date Other

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.