CVE-2025-3277

An integer overflow can be triggered in SQLite’s `concat_ws()` function. The resulting, truncated integer is then used to allocate a buffer. When SQLite then writes the resulting string to the buffer, it uses the original, untruncated size and thus a wild Heap Buffer overflow of size ~4GB can be triggered. This can result in arbitrary code execution.

CVSS 4.0

6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

1.3% chance of exploitation in the next 30 days; higher than 69% of CVEs (scores of 2026-10-25)

CWEs

CWE-190, CWE-122

Published

2025-04-14

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• sqlite:sqlite

References

• https://sqlite.org/src/info/498e3f1cf57f164f
• https://cert-portal.siemens.com/productcert/html/ssa-398330.html
• https://cert-portal.siemens.com/productcert/html/ssa-994087.html

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