Libvirt: negative g_new0 length can lead to unbounded memory allocation

{
  "id": "04df65a53bc6856963b4a815d5dc224642db2c820ce695d2cc02fe2aecb0156e",
  "url": "https://osv.dev/vulnerability/CVE-2024-2494",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Libvirt: negative g_new0 length can lead to unbounded memory allocation",
    "summary": "A flaw was found in the RPC library APIs of libvirt. The RPC server deserialization code allocates memory for arrays before the non-negative length check is performed by the C API entry points. Passing a negative length to the g_new0 function results in a crash due to the negative length being treated as a huge positive number. This flaw allows a local, unprivileged user to perform a denial of service attack by causing the libvirt daemon to crash.",
    "evidence": "osv:CVE-2024-2494",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-2494",
      "aliases": [
        "CVE-2024-2494"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/libvirt/libvirt",
              "type": "GIT",
              "events": [
                {
                  "introduced": "21b0099b79eccb5e89cea037db6d58480ae02553"
                },
                {
                  "fixed": "8cb0572d7a791d7254274191201fe9fb4ca8c27f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "9.0.0"
                      },
                      {
                        "fixed": "9.7.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v9.7.0-rc2",
            "v9.7.0-rc1",
            "v9.6.0",
            "v9.6.0-rc2",
            "v9.6.0-rc1",
            "CVE-2023-3750",
            "v9.5.0",
            "v9.5.0-rc2",
            "v9.5.0-rc1",
            "v9.4.0",
            "v9.4.0-rc2",
            "v9.4.0-rc1",
            "v9.3.0",
            "v9.3.0-rc2",
            "v9.3.0-rc1",
            "v9.2.0",
            "v9.2.0-rc2",
            "v9.2.0-rc1",
            "v9.1.0",
            "v9.1.0-rc2",
            "v9.1.0-rc1",
            "v9.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-2494.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.177216273Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/downloads/content/package-browser/",
        "https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html",
        "https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/BKRQXPLPC6B7FLHJXSBQYW7HNDEBW6RJ/",
        "https://access.redhat.com/errata/RHSA-2024:2560",
        "https://access.redhat.com/errata/RHSA-2024:3253",
        "https://access.redhat.com/security/cve/CVE-2024-2494",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/2xxx/CVE-2024-2494.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-2494",
        "https://security.netapp.com/advisory/ntap-20240517-0009/",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2270115",
        "https://gitlab.com/libvirt/libvirt/"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-789"
        ],
        "cna_assigner": "redhat",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "8100020240409073027.489197e6"
                  },
                  {
                    "fixed": "8100020240409073027.489197e6"
                  },
                  {
                    "fixed": "0:10.0.0-6.2.el9_4"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "InverseAffectedRanges"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/2xxx/CVE-2024-2494.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-2494",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489528,
  "published_at": "2024-03-21T13:39:08.847+00:00"
}