CVE-2021-20227: A flaw was found in SQLite's SELECT query functionality (src/select.c). This flaw allows an attacker who is capable of running SQL queries locally on the SQLite database to cause a denial of service or possible code execution by triggering a use-after-free. The highest threat from this vulnerability is to system availability.

CSIRTS triage

What: SQLite SELECT query handling contains a use-after-free vulnerability in src/select.c that allows denial of service or code execution.
Who is affected: Applications using SQLite for local SQL query processing are affected.
Urgency: Medium severity (CVSS 5.5) with local access required; upgrade is standard practice.
Action: Update SQLite to a patched version that fixes the use-after-free in SELECT query processing.

AI-assisted analysis generated from the source advisory — verify against the original.

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EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2021-202270.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.

CVE	CSIRTS overview	External
CVE-2021-20227	coverage & exploitation status	NVD · CVE.org