Fix CVE(s): CVE-2026-32853, CVE-2026-32854

{
  "id": "a91d85181cc89922cb57a87031f6317a311823cfd5c4d248259b8af30a33fc90",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1789783613",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2026-32853, CVE-2026-32854",
    "summary": "* SECURITY UPDATE: Heap out-of-bounds read in UltraZip subrect parsing - debian/patches/CVE-2026-32853.patch: bound the subrect cursor to the decompressed data in HandleUltraZipBPP() (libvncclient/ultra.c) - CVE-2026-32853 * SECURITY UPDATE: NULL pointer dereference in httpd proxy handlers - debian/patches/CVE-2026-32854.patch: NULL-check the strchr() results in httpProcessInput() (libvncserver/httpd.c) - CVE-2026-32854",
    "evidence": "osv:CLSA-2026-1789783613",
    "products": [
      {
        "name": {
          "value": "libvncclient1",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.9.11+dfsg-1ubuntu1.4+tuxcare.els1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libvncserver-config",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.9.11+dfsg-1ubuntu1.4+tuxcare.els1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libvncserver-dev",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.9.11+dfsg-1ubuntu1.4+tuxcare.els1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libvncserver1",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.9.11+dfsg-1ubuntu1.4+tuxcare.els1",
            "evidence": "/affected/3/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1789783613",
      "aliases": [
        "CLSA-2026-1789783613"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0.9.11+dfsg-1ubuntu1.4+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libvncclient1",
            "purl": "pkg:deb/tuxcare/libvncclient1?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1789783613.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0.9.11+dfsg-1ubuntu1.4+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libvncserver-config",
            "purl": "pkg:deb/tuxcare/libvncserver-config?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1789783613.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0.9.11+dfsg-1ubuntu1.4+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libvncserver-dev",
            "purl": "pkg:deb/tuxcare/libvncserver-dev?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1789783613.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0.9.11+dfsg-1ubuntu1.4+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libvncserver1",
            "purl": "pkg:deb/tuxcare/libvncserver1?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1789783613.json"
          }
        }
      ],
      "modified": "2026-10-26T09:32:04.239277149Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-32853",
        "CVE-2026-32854"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1789783613.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-32853",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-32854"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-32853",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-32854",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449588,
  "published_at": "2026-09-19T08:57:30+00:00"
}