CVE-2026-74460 (GCVE-0-2026-74460)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:36
VLAI
Title
can: ems_usb: validate CPC message lengths
Summary
In the Linux kernel, the following vulnerability has been resolved: can: ems_usb: validate CPC message lengths ems_usb_read_bulk_callback() walks CPC messages packed in one USB receive buffer. Check that each declared message fits in the URB payload. Also require the type-specific payload to cover the fields used by the CAN, state, error and overrun handlers.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < bb3cc8da8a2967c0f8e83d148fc6870b19fa32c6 (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < db5655287d78f00daf98888a520bb8da4d30126d (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < ce8125566b1d0b0f16449407e014addf451804ea (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < 0b9090717c7e2184e2c427bbcc752f295116ac1d (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < 0b23144c59c126beb4a7761a85a194ae0fe668a5 (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < df3ac2a672a5284441f120d486acabdd6740fc2a (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < 02925f51377f2a42a6724f00549167499c9302e5 (git)
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Linux Linux Affected: 2.6.32
Unaffected: 0 , < 2.6.32 (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/ems_usb.c"
          ],
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              "versionType": "git"
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          "vendor": "Linux",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
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              "version": "7.1.8",
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            },
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              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "operator": "OR"
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: ems_usb: validate CPC message lengths\n\nems_usb_read_bulk_callback() walks CPC messages packed in one USB\nreceive buffer.\n\nCheck that each declared message fits in the URB payload. Also require the\ntype-specific payload to cover the fields used by the CAN, state, error and\noverrun handlers."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:36:57.996Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/bb3cc8da8a2967c0f8e83d148fc6870b19fa32c6"
        },
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          "url": "https://git.kernel.org/stable/c/db5655287d78f00daf98888a520bb8da4d30126d"
        },
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          "url": "https://git.kernel.org/stable/c/ce8125566b1d0b0f16449407e014addf451804ea"
        },
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          "url": "https://git.kernel.org/stable/c/02925f51377f2a42a6724f00549167499c9302e5"
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      ],
      "title": "can: ems_usb: validate CPC message lengths",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74460",
    "datePublished": "2026-08-15T12:27:01.274Z",
    "dateReserved": "2026-08-15T05:44:03.901Z",
    "dateUpdated": "2026-08-19T16:36:57.996Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-08-28",
      "epss": "0.00173",
      "percentile": "0.06788"
    },
    "microsoft_vex": {
      "current_release_date": "2026-08-23T15:01:54.000Z",
      "cve": "CVE-2026-74460",
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      "initial_release_date": "2026-08-23T15:01:54.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "can: ems_usb: validate CPC message lengths",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74460.json",
      "version": "1"
    },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-19T17:42:00+00:00",
      "cve": "CVE-2026-74460",
      "id": "CVE-2026-74460",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: can: ems_usb: validate CPC message lengths",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74460.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

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.