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Security advisory

Type: advisorySources: OSVCVE: CVE-2019-15693

TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which occurs in TightDecoder::FilterGradient. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.

Products
Not specified
Affected versions
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Fixed versions
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CVEs
CVE-2019-15693
Confirmed fixed CVEs
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Updated in this feed
31 Oct 2026, 12:30 UTC · Revision 1

Source evidence

CVE-2019-15693

core-osv · Original source

Published 26 Dec 2019, 15:15 UTC

TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which occurs in TightDecoder::FilterGradient. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.

osv:CVE-2019-15693
Complete source record
{
  "id": "1aef5e1dd519a669f0ef6352e17327f94a2cb9986dcb12e55a69fed785b685f4",
  "url": "https://osv.dev/vulnerability/CVE-2019-15693",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-15693",
    "summary": "TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which occurs in TightDecoder::FilterGradient. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.",
    "evidence": "osv:CVE-2019-15693",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-15693",
      "aliases": [
        "CVE-2019-15693"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "repo": "https://github.com/cendioossman/tigervnc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b4ada8d0c6dac98c8b91fc64d112569a8ae5fb95"
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              "database_specific": {
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                    "range": [
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                    "source": "REFERENCES_COMMIT"
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          "versions": [
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            "v0.0.90"
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          "database_specific": {
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            "vanir_signatures": [
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                "id": "CVE-2019-15693-0778f897",
                "digest": {
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                  "function_hash": "161533384762656642991908016226820675801"
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                "source": "https://github.com/cendioossman/tigervnc/commit/b4ada8d0c6dac98c8b91fc64d112569a8ae5fb95",
                "target": {
                  "file": "common/rfb/tightDecode.h",
                  "function": "TightDecoder::FilterGradient24"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
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                "source": "https://github.com/cendioossman/tigervnc/commit/b4ada8d0c6dac98c8b91fc64d112569a8ae5fb95",
                "target": {
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                  "function": "TightDecoder::FilterGradient"
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                "signature_type": "Function",
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                "target": {
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                "signature_type": "Line",
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            "vanir_signatures_modified": "2026-10-20T13:45:07Z"
          }
        },
        {
          "ranges": [
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              "repo": "https://github.com/tigervnc/tigervnc",
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              ],
              "database_specific": {
                "extracted_events": [
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                    "cpe": "cpe:2.3:a:tigervnc:tigervnc:*:*:*:*:*:*:*:*",
                    "range": [
                      {
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                      {
                        "fixed": "1.10.1"
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                    ],
                    "source": "CPE_RANGE"
                  },
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                    "range": [
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                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.10.1"
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          ],
          "versions": [
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-15693.json"
          }
        }
      ],
      "modified": "2026-10-20T13:45:07.488773210Z",
      "provider": "osv",
      "references": [
        "https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1",
        "https://github.com/CendioOssman/tigervnc/commit/b4ada8d0c6dac98c8b91fc64d112569a8ae5fb95",
        "https://www.openwall.com/lists/oss-security/2019/12/20/2"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-15693",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388059,
  "published_at": "2019-12-26T15:15:11.257+00:00"
}