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SQLite before 3.53.2 Heap Buffer Overflow via FTS5 fts5ChunkIterate

Type: advisorySources: OSV

SQLite before 3.53.2 contains a heap-based buffer overflow vulnerability in the FTS5 full-text search extension that allows attackers to cause a crash or execute arbitrary code by supplying a crafted database with malicious continuation page metadata specifying a szLeaf value smaller than 4. Attackers can trigger an integer underflow in fts5ChunkIterate() causing an inflated remaining byte count during FTS5 MATCH query processing, leading to a heap buffer overflow of attacker-controlled data in applications compiled with SQLITE_ENABLE_FTS5.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-11824
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 15:36 UTC · Revision 1

Source evidence

SQLite before 3.53.2 Heap Buffer Overflow via FTS5 fts5ChunkIterate

core-osv · Original source

Published 9 Jun 2026, 19:21 UTC

SQLite before 3.53.2 contains a heap-based buffer overflow vulnerability in the FTS5 full-text search extension that allows attackers to cause a crash or execute arbitrary code by supplying a crafted database with malicious continuation page metadata specifying a szLeaf value smaller than 4. Attackers can trigger an integer underflow in fts5ChunkIterate() causing an inflated remaining byte count during FTS5 MATCH query processing, leading to a heap buffer overflow of attacker-controlled data in applications compiled with SQLITE_ENABLE_FTS5.

osv:CVE-2026-11824
Complete source record
{
  "id": "45e9f0c51547c50300df84c5fa2bd0b0afa2fa4548998a9512515dde1c79fdee",
  "url": "https://osv.dev/vulnerability/CVE-2026-11824",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SQLite before 3.53.2 Heap Buffer Overflow via FTS5 fts5ChunkIterate",
    "summary": "SQLite before 3.53.2 contains a heap-based buffer overflow vulnerability in the FTS5 full-text search extension that allows attackers to cause a crash or execute arbitrary code by supplying a crafted database with malicious continuation page metadata specifying a szLeaf value smaller than 4. Attackers can trigger an integer underflow in fts5ChunkIterate() causing an inflated remaining byte count during FTS5 MATCH query processing, leading to a heap buffer overflow of attacker-controlled data in applications compiled with SQLITE_ENABLE_FTS5.",
    "evidence": "osv:CVE-2026-11824",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-11824",
      "aliases": [
        "BIT-sqlite-2026-11824",
        "CVE-2026-11824"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/sqlite/sqlite",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ccc132c5be20ab5c755c97a08d06b1b592fef330"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:sqlite:sqlite:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.53.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11824.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.987038967Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-765416.html",
        "https://sqlite.org/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11824.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-11824",
        "https://sqlite.org/releaselog/3_53_2.html",
        "https://www.vulncheck.com/advisories/sqlite-before-heap-buffer-overflow-via-fts5-fts5chunkiterate",
        "https://sqlite.org/src/info/061febcf41ca",
        "https://sqlite.org/src/info/4a5ad516ea93"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-122"
        ],
        "cna_assigner": "VulnCheck",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "3.53.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11824.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-11824",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496883,
  "published_at": "2026-06-09T19:21:42.603+00:00"
}