libssh2: Fix of CVE-2026-66032

{
  "id": "3bae2e84d9521210b42c8b3494658c782fe66e94c4e56f3538a9bf51de3d4884",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1787393556",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "libssh2: Fix of CVE-2026-66032",
    "summary": "- CVE-2026-66032: nullify data after free in sftp_open() to prevent a double-free when sftp_packet_require() fails on the FXP_STATUS/FX_OK path",
    "evidence": "osv:CLSA-2026-1787393556",
    "products": [
      {
        "name": {
          "value": "libssh2",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.4.2-3.0.1.el6_10.1.tuxcare.ol.els7",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libssh2-devel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.4.2-3.0.1.el6_10.1.tuxcare.ol.els7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libssh2-docs",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.4.2-3.0.1.el6_10.1.tuxcare.ol.els7",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1787393556",
      "aliases": [
        "CLSA-2026-1787393556"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.4.2-3.0.1.el6_10.1.tuxcare.ol.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "libssh2",
            "purl": "pkg:rpm/tuxcare/libssh2?distro=oraclelinux-6",
            "ecosystem": "TuxCare:OracleLinux:6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1787393556.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.4.2-3.0.1.el6_10.1.tuxcare.ol.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "libssh2-devel",
            "purl": "pkg:rpm/tuxcare/libssh2-devel?distro=oraclelinux-6",
            "ecosystem": "TuxCare:OracleLinux:6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1787393556.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.4.2-3.0.1.el6_10.1.tuxcare.ol.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "libssh2-docs",
            "purl": "pkg:rpm/tuxcare/libssh2-docs?distro=oraclelinux-6",
            "ecosystem": "TuxCare:OracleLinux:6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1787393556.json"
          }
        }
      ],
      "modified": "2026-10-26T09:31:55.208825574Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-66032"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/oraclelinux6els/CLSA-2026-1787393556.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-66032"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-66032",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 448961,
  "published_at": "2026-08-22T10:12:46+00:00"
}