Fix CVE(s): CVE-2025-15661, CVE-2026-7598

{
  "id": "938079ea413c25a09376920aaebcf49e75e3ed1c85ba9506ad25de0c2dec2084",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1791823540",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2025-15661, CVE-2026-7598",
    "summary": "* SECURITY UPDATE: out-of-bounds heap read in SFTP symlink handling - debian/patches/CVE-2025-15661.patch: validate that the link length in a SSH_FXP_NAME response fits within the received packet before copying it in sftp_symlink() in src/sftp.c - CVE-2025-15661",
    "evidence": "osv:CLSA-2026-1791823540",
    "products": [
      {
        "name": {
          "value": "libssh2-1",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.8.0-2.1ubuntu0.1+tuxcare.els4",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libssh2-1-dev",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.8.0-2.1ubuntu0.1+tuxcare.els4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1791823540",
      "aliases": [
        "CLSA-2026-1791823540"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.8.0-2.1ubuntu0.1+tuxcare.els4"
                }
              ]
            }
          ],
          "package": {
            "name": "libssh2-1",
            "purl": "pkg:deb/tuxcare/libssh2-1?distro=ubuntu-20.04",
            "ecosystem": "TuxCare:Ubuntu:20.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791823540.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.8.0-2.1ubuntu0.1+tuxcare.els4"
                }
              ]
            }
          ],
          "package": {
            "name": "libssh2-1-dev",
            "purl": "pkg:deb/tuxcare/libssh2-1-dev?distro=ubuntu-20.04",
            "ecosystem": "TuxCare:Ubuntu:20.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791823540.json"
          }
        }
      ],
      "modified": "2026-10-26T09:32:05.636747957Z",
      "provider": "osv",
      "upstream": [
        "CVE-2025-15661",
        "CVE-2026-7598"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu20.04els/CLSA-2026-1791823540.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-15661",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-7598"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2025-15661",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-7598",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449715,
  "published_at": "2026-10-19T15:58:53+00:00"
}