CVE-2026-75805 affecting package openvmm 0.1.0-1

{
  "id": "2eafc03f4c0347f7e1f68f5355f09ec5f8b6071d15a630772b8ced7c9f8739e0",
  "url": "https://osv.dev/vulnerability/AZL-105600",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-75805 affecting package openvmm 0.1.0-1",
    "summary": "Issue summary: A CMP client that requests certificate revocation on the basis of a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when processing a crafted revocation response. Impact summary: The NULL pointer dereference happens on a read which leads to a crash and a Denial of Service for the affected client application. CWE: CWE-476: NULL-pointer dereference Description: A CMP client revoking a certificate has to tell the server which certificate to revoke, and may do so by supplying a PKCS#10 CSR instead of the certificate itself or its issuer name and serial number. This is 'openssl cmp -cmd rr -csr ' on the command line, or OSSL_CMP_exec_RR_ses() with the certificate supplied via OSSL_CMP_CTX_set1_p10CSR() through the API. A CSR does not contain the issuer name and serial number of the certificate, so the client does not send them. A server may optionally name the certificate it revoked in its response, and the client then compares that name against what it sent. Having sent neither an issuer name nor a serial number, it has nothing to compare against, and a server returning a specially crafted name causes the client to read from a NULL pointer and crash. The revocation response is checked for valid message protection before the affected code is reached, so an attacker must be a malicious or compromised CMP server, or a man-in-the-middle in possession of the secret used for message protection. Clients that identify the certificate to be revoked by a ",
    "evidence": "osv:AZL-105600",
    "products": [
      {
        "name": {
          "value": "openvmm",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-105600",
      "aliases": [
        "AZL-105600"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "0.1.0-1"
                }
              ]
            }
          ],
          "package": {
            "name": "openvmm",
            "purl": "pkg:rpm/azure-linux/openvmm",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105600.json"
          }
        }
      ],
      "modified": "2026-10-15T05:37:09Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-75805"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-75805"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-75805",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 321331,
  "published_at": "2026-09-29T16:17:11+00:00"
}