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Description

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.

PUBLISHED Reserved 2026-06-09 | Published 2026-06-09 | Updated 2026-06-09 | Assigner VulnCheck




HIGH: 8.5CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Problem types

CWE-122 Heap-based Buffer Overflow

Product status

Default status
unaffected

Any version before 3.53.2
affected

Credits

Ashish Kunwar (@D0rkerDevil) finder

References

sqlite.org/src/info/061febcf41ca patch

sqlite.org/src/info/4a5ad516ea93 patch

sqlite.org/releaselog/3_53_2.html release-notes

www.vulncheck.com/...ffer-overflow-via-fts5-fts5chunkiterate third-party-advisory

cve.org (CVE-2026-11824)

nvd.nist.gov (CVE-2026-11824)

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