Drivers: vmbus: Check for channel allocation before looking up relids

{
  "id": "0fed633cf99dc5b59de5a3bb05d2f4d675ec2ce91dab5e0610b997bcd7626c5f",
  "url": "https://osv.dev/vulnerability/CVE-2023-53273",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Drivers: vmbus: Check for channel allocation before looking up relids",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Drivers: vmbus: Check for channel allocation before looking up relids relid2channel() assumes vmbus channel array to be allocated when called. However, in cases such as kdump/kexec, not all relids will be reset by the host. When the second kernel boots and if the guest receives a vmbus interrupt during vmbus driver initialization before vmbus_connect() is called, before it finishes, or if it fails, the vmbus interrupt service routine is called which in turn calls relid2channel() and can cause a null pointer dereference. Print a warning and error out in relid2channel() for a channel id that's invalid in the second kernel.",
    "evidence": "osv:CVE-2023-53273",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.178",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.107",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.24",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.2.11",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-53273",
      "aliases": [
        "CVE-2023-53273"
      ],
      "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": "8b6a877c060ed6b86878fe66c7c6493a6054cf23"
                },
                {
                  "fixed": "176c6b4889195fbe7016d9401175b48c5c9edf68"
                },
                {
                  "fixed": "c373e49fbb87aa177819866ed9194ebc5414dfd6"
                },
                {
                  "fixed": "8c3f0ae5435fd20bb1e3a8308488aa6ac33151ee"
                },
                {
                  "fixed": "a5c44f3446a0565139b7d8abc78f58b86c398123"
                },
                {
                  "fixed": "1eb65c8687316c65140b48fad27133d583178e15"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53273.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.8.0"
                },
                {
                  "fixed": "5.10.178"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.107"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.24"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.2.11"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53273.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.396028684Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/176c6b4889195fbe7016d9401175b48c5c9edf68",
        "https://git.kernel.org/stable/c/1eb65c8687316c65140b48fad27133d583178e15",
        "https://git.kernel.org/stable/c/8c3f0ae5435fd20bb1e3a8308488aa6ac33151ee",
        "https://git.kernel.org/stable/c/a5c44f3446a0565139b7d8abc78f58b86c398123",
        "https://git.kernel.org/stable/c/c373e49fbb87aa177819866ed9194ebc5414dfd6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53273.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53273",
        "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/2023/53xxx/CVE-2023-53273.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-53273",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492696,
  "published_at": "2025-09-16T08:11:08.792+00:00"
}