CVE-2025-0236
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 · uneditedOut-of-bounds vulnerability in slope processing during curve rendering in Generic PCL6 V4 Printer Driver / Generic UFR II V4 Printer Driver / Generic LIPSLX V4 Printer Driver.
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 confidenceAn out-of-bounds memory access vulnerability exists in the slope processing logic during curve rendering in Canon Generic PCL6 V4, UFR II V4, and LIPSLX V4 printer drivers. The vulnerability occurs when processing mathematical curves, where improper bounds checking allows memory outside the allocated buffer to be accessed, potentially leading to memory corruption, crash, or potentially code execution.
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
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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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Identify installed Canon printer driversOpen Windows Control Panel > Devices and Printers, or run 'printui /s' to view installed printer drivers. Look for Canon Generic PCL6 V4, UFR II V4, or LIPSLX V4 drivers.Affected if Any of these three Canon driver families are installed
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Determine driver versionRight-click the Canon printer driver in Devices and Printers, select Printer Properties, and check the Driver Version field. Alternatively, navigate to C:\Windows\System32\spool\drivers\x64\ (or x86) and locate the Canon driver files (typically .dll files with 'CN' prefix), then right-click to view Properties > Details > File Version.Affected if Driver version falls below the patched version (compare against vendor advisories)
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Verify print spooler service is runningOpen Services (services.msc), locate Print Spooler, and check its Status. Or run 'sc query spooler' in Command Prompt.Affected if Print Spooler service is running, enabling the vulnerable curve rendering code path when print jobs are processed
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Check for recent print job activityReview print job logs in Windows Event Viewer under Applications and Services Logs > Microsoft > Windows > PrintService. Or check the print queue for recent jobs.Affected if Recent print jobs have been processed through the affected driver, triggering the vulnerable slope processing logic
You are affected if any Canon Generic PCL6 V4, UFR II V4, or LIPSLX V4 printer driver is installed with an unpatched version and the Print Spooler service has processed jobs using that driver.
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-supplied driver updates when available. Until patches are released, restrict network access to affected printers and validate print job inputs. CVSS 5.3 indicates network-adjacent attack vector with low privileges required.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-0236 — 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-2025-0236 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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