can: etas_es58x: fix potential NULL pointer dereference on udev->serial

{
  "id": "951d632e18d8264739ee5a19adf9aa36c2375d2b94e685b146a256ac79567114",
  "url": "https://osv.dev/vulnerability/CVE-2025-21773",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "can: etas_es58x: fix potential NULL pointer dereference on udev->serial",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: fix potential NULL pointer dereference on udev->serial The driver assumed that es58x_dev->udev->serial could never be NULL. While this is true on commercially available devices, an attacker could spoof the device identity providing a NULL USB serial number. That would trigger a NULL pointer dereference. Add a check on es58x_dev->udev->serial before accessing it.",
    "evidence": "osv:CVE-2025-21773",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.79",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-21773",
      "aliases": [
        "CVE-2025-21773"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9f06631c3f1f0f298536443df85a6837ba4c5f5c"
                },
                {
                  "fixed": "1590667a60753ee5a54871f2840ceefd4a7831fa"
                },
                {
                  "fixed": "722e8e1219c8b6ac2865011fe339315d6a8d0721"
                },
                {
                  "fixed": "5059ea98d7bc133903d3e47ab36df6ed11d0c95f"
                },
                {
                  "fixed": "a1ad2109ce41c9e3912dadd07ad8a9c640064ffb"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21773.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.79"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.16"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21773.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.215709071Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1590667a60753ee5a54871f2840ceefd4a7831fa",
        "https://git.kernel.org/stable/c/5059ea98d7bc133903d3e47ab36df6ed11d0c95f",
        "https://git.kernel.org/stable/c/722e8e1219c8b6ac2865011fe339315d6a8d0721",
        "https://git.kernel.org/stable/c/a1ad2109ce41c9e3912dadd07ad8a9c640064ffb",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21773.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21773",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21773.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21773",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 500275,
  "published_at": "2025-02-27T02:18:20.013+00:00"
}