{
  "schema_version": "1.7.0",
  "id": "MGASA-2026-0425",
  "published": "2026-09-20T04:25:32Z",
  "modified": "2026-09-20T02:50:24Z",
  "summary": "Updated libssh packages fix security vulnerabilities",
  "details": "Stack buffer overflow in SFTP server longname construction.\n(CVE-2026-15370)\nDenial of service via zero advertised channel packet size.\n(CVE-2026-59843)\nDenial of service via oversized SFTP read length. (CVE-2026-59844)\nDenial of service via unchecked ProxyCommand fork() failure.\n(CVE-2026-59845)\nInformation disclosure via ProxyCommand %r username expansion.\n(CVE-2026-59846)\nIntegrity downgrade via OpenSSL AES-GCM tag verification.\n(CVE-2026-59847)\nDenial of service via SFTP responses with unknown request IDs.\n(CVE-2026-59848)\nDenial of service via automatic certificate authentication loop.\n(CVE-2026-59849)\nUse-after-free via data callbacks on closed channels. (CVE-2026-59850)\n",
  "upstream": [
    "CVE-2026-15370",
    "CVE-2026-59843",
    "CVE-2026-59844",
    "CVE-2026-59845",
    "CVE-2026-59846",
    "CVE-2026-59847",
    "CVE-2026-59848",
    "CVE-2026-59849",
    "CVE-2026-59850"
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://advisories.mageia.org/MGASA-2026-0425.html"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.mageia.org/show_bug.cgi?id=35983"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2026/07/21/7"
    },
    {
      "type": "WEB",
      "url": "https://www.libssh.org/2026/07/21/libssh-0-12-1-and-0-11-5-security-releases/"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MIVTLBAG4MPX3WGPMVYDO2UPZB6G3ESR/"
    },
    {
      "type": "WEB",
      "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/message/YZ324UUCGQ4JEC4ZOJMJODWYVPSFBWUU/"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-security-announce/2026/msg00321.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8699-1"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Mageia:10",
        "name": "libssh",
        "purl": "pkg:rpm/mageia/libssh?arch=source&distro=mageia-10"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.11.5-1.mga10"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "section": "core"
      }
    },
    {
      "package": {
        "ecosystem": "Mageia:9",
        "name": "libssh",
        "purl": "pkg:rpm/mageia/libssh?arch=source&distro=mageia-9"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.10.6-1.3.mga9"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "section": "core"
      }
    }
  ],
  "credits": [
    {
      "name": "Mageia",
      "type": "COORDINATOR",
      "contact": [
        "https://wiki.mageia.org/en/Packages_Security_Team"
      ]
    }
  ]
}