CVE-2025-61019
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn issue in the sqlo_key_part_best component of openlink virtuoso-opensource v7.2.11 allows attackers to cause a Denial of Service (DoS) via crafted SQL statements.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA denial of service vulnerability exists in the sqlo_key_part_best component of OpenLink Virtuoso Open-Source v7.2.11, which handles SQL query key part optimization. Attackers can trigger the vulnerability via crafted SQL statements, likely causing the query optimizer to crash or enter an infinite loop, rendering the database unavailable.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check installed Virtuoso versionRun 'virtuoso-t -?' or check the installed package version via system package manager (dpkg -l | grep virtuoso or rpm -qa | grep virtuoso). Also can query via isql: 'SELECT sys_stat('DB_NAME');' and check build information.Affected if Version is v7.2.11 exactly, or falls within the v7.2.x range prior to patch availability. The vulnerability affects v7.2.11 specifically.
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Verify SQL optimizer is in useConfirm the Virtuoso SQL service is running and accepting queries. Check process status: 'ps aux | grep virtuoso' and verify the isql port (default 1111) is listening.Affected if The SQL service is running and processing queries. The sqlo_key_part_best component is part of the query optimizer used for all SQL query planning.
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Review error logs for optimizer crashesExamine Virtuoso error log (typically in the database directory, named virtuoso.log or errors.log) for recent crashes, aborts, or hangs related to 'sqlo_key_part_best' or 'optimizer' keywords. Check system logs (/var/log/syslog) for segfaults from virtuoso processes.Affected if Logs show recent crashes or aborts occurring during query optimization, particularly with complex queries using key parts or indexes.
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Check for hung queries or DoS symptomsMonitor for unusually long-running queries or connection timeouts. Use isql to check: 'SQL> status();' Look for queries in 'executing' state for excessive time, or frequent service restarts.Affected if Database exhibits frequent hangs, timeouts, or requires restarts after certain SQL queries are executed, indicating potential optimizer instability.
You are affected if running Virtuoso Open-Source v7.2.11 and experience query optimizer crashes, hangs, or database unavailability after processing crafted SQL statements, or if logs show sqlo_key_part_best related failures.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply vendor patch for virtuoso-opensource v7.2.11 when released; as interim measures, implement query timeouts and SQL statement analysis/rejection at the application or proxy layer to block known malicious query patterns.
- Consultation4.0 h
- Implementation8.0 h
- Testing12.0 h
- Review / QA6.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-61019 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-61019 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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