Vulnerability-Lookup

GHSA-V7RC-Q48Q-F2P3

Vulnerability from github – Published: 2026-03-25 12:30 – Updated: 2026-03-25 12:30

Details

In the Linux kernel, the following vulnerability has been resolved:

can: ucan: Fix infinite loop from zero-length messages

If a broken ucan device gets a message with the message length field set to 0, then the driver will loop for forever in ucan_read_bulk_callback(), hanging the system. If the length is 0, just skip the message and go on to the next one.

This has been fixed in the kvaser_usb driver in the past in commit 0c73772cd2b8 ("can: kvaser_usb: leaf: Fix potential infinite loop in command parsers"), so there must be some broken devices out there like this somewhere.

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23298"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-25T11:16:25Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: ucan: Fix infinite loop from zero-length messages\n\nIf a broken ucan device gets a message with the message length field set\nto 0, then the driver will loop for forever in\nucan_read_bulk_callback(), hanging the system.  If the length is 0, just\nskip the message and go on to the next one.\n\nThis has been fixed in the kvaser_usb driver in the past in commit\n0c73772cd2b8 (\"can: kvaser_usb: leaf: Fix potential infinite loop in\ncommand parsers\"), so there must be some broken devices out there like\nthis somewhere.",
  "id": "GHSA-v7rc-q48q-f2p3",
  "modified": "2026-03-25T12:30:22Z",
  "published": "2026-03-25T12:30:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23298"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/13b646eec3ba1131180803f5aaf1fee23540ad8f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e446fd0582ad8be9f6dafb115fc2e7245f9bea7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab6f075492d37368b4c7b0df7f7fdc2b666887fc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd85f21a6219aeae4389d700c54f1799f4b814e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7bc62be6c1a60bb21301692009590b1ffda91d9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-23298 (GCVE-0-2026-23298)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:26 – Updated: 2026-03-25 10:26

Title

can: ucan: Fix infinite loop from zero-length messages

Summary

In the Linux kernel, the following vulnerability has been resolved: can: ucan: Fix infinite loop from zero-length messages If a broken ucan device gets a message with the message length field set to 0, then the driver will loop for forever in ucan_read_bulk_callback(), hanging the system. If the length is 0, just skip the message and go on to the next one. This has been fixed in the kvaser_usb driver in the past in commit 0c73772cd2b8 ("can: kvaser_usb: leaf: Fix potential infinite loop in command parsers"), so there must be some broken devices out there like this somewhere.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/ab6f075492d37368b…
	https://git.kernel.org/stable/c/13b646eec3ba11311…
	https://git.kernel.org/stable/c/bd85f21a6219aeae4…
	https://git.kernel.org/stable/c/aa9e0a7fe5efc2f74…
	https://git.kernel.org/stable/c/c7bc62be6c1a60bb2…
	https://git.kernel.org/stable/c/1e446fd0582ad8be9…

Impacted products

Vendor

Product

Version

Linux

Affected: 9f2d3eae88d26c29d96e42983b755940d9169cd9 , < ab6f075492d37368b4c7b0df7f7fdc2b666887fc (git)
Affected: 9f2d3eae88d26c29d96e42983b755940d9169cd9 , < 13b646eec3ba1131180803f5aaf1fee23540ad8f (git)
Affected: 9f2d3eae88d26c29d96e42983b755940d9169cd9 , < bd85f21a6219aeae4389d700c54f1799f4b814e0 (git)
Affected: 9f2d3eae88d26c29d96e42983b755940d9169cd9 , < aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588 (git)
Affected: 9f2d3eae88d26c29d96e42983b755940d9169cd9 , < c7bc62be6c1a60bb21301692009590b1ffda91d9 (git)
Affected: 9f2d3eae88d26c29d96e42983b755940d9169cd9 , < 1e446fd0582ad8be9f6dafb115fc2e7245f9bea7 (git)

Linux

Affected: 4.19
Unaffected: 0 , < 4.19 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.77 , ≤ 6.12.* (semver)
Unaffected: 6.18.17 , ≤ 6.18.* (semver)
Unaffected: 6.19.7 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/ucan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ab6f075492d37368b4c7b0df7f7fdc2b666887fc",
              "status": "affected",
              "version": "9f2d3eae88d26c29d96e42983b755940d9169cd9",
              "versionType": "git"
            },
            {
              "lessThan": "13b646eec3ba1131180803f5aaf1fee23540ad8f",
              "status": "affected",
              "version": "9f2d3eae88d26c29d96e42983b755940d9169cd9",
              "versionType": "git"
            },
            {
              "lessThan": "bd85f21a6219aeae4389d700c54f1799f4b814e0",
              "status": "affected",
              "version": "9f2d3eae88d26c29d96e42983b755940d9169cd9",
              "versionType": "git"
            },
            {
              "lessThan": "aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588",
              "status": "affected",
              "version": "9f2d3eae88d26c29d96e42983b755940d9169cd9",
              "versionType": "git"
            },
            {
              "lessThan": "c7bc62be6c1a60bb21301692009590b1ffda91d9",
              "status": "affected",
              "version": "9f2d3eae88d26c29d96e42983b755940d9169cd9",
              "versionType": "git"
            },
            {
              "lessThan": "1e446fd0582ad8be9f6dafb115fc2e7245f9bea7",
              "status": "affected",
              "version": "9f2d3eae88d26c29d96e42983b755940d9169cd9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/ucan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.19"
            },
            {
              "lessThan": "4.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.77",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.167",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.130",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.77",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.17",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.7",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0-rc3",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: ucan: Fix infinite loop from zero-length messages\n\nIf a broken ucan device gets a message with the message length field set\nto 0, then the driver will loop for forever in\nucan_read_bulk_callback(), hanging the system.  If the length is 0, just\nskip the message and go on to the next one.\n\nThis has been fixed in the kvaser_usb driver in the past in commit\n0c73772cd2b8 (\"can: kvaser_usb: leaf: Fix potential infinite loop in\ncommand parsers\"), so there must be some broken devices out there like\nthis somewhere."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T10:26:54.830Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ab6f075492d37368b4c7b0df7f7fdc2b666887fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/13b646eec3ba1131180803f5aaf1fee23540ad8f"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd85f21a6219aeae4389d700c54f1799f4b814e0"
        },
        {
          "url": "https://git.kernel.org/stable/c/aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588"
        },
        {
          "url": "https://git.kernel.org/stable/c/c7bc62be6c1a60bb21301692009590b1ffda91d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/1e446fd0582ad8be9f6dafb115fc2e7245f9bea7"
        }
      ],
      "title": "can: ucan: Fix infinite loop from zero-length messages",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23298",
    "datePublished": "2026-03-25T10:26:54.830Z",
    "dateReserved": "2026-01-13T15:37:45.993Z",
    "dateUpdated": "2026-03-25T10:26:54.830Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-V7RC-Q48Q-F2P3

CVE-2026-23298 (GCVE-0-2026-23298)

Tags

Sightings

Nomenclature