Microsoft Security Response CenterCVE-2025-4207

PostgreSQL GB18030 encoding validation can read one byte past end of allocation for text that fails validation

Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability? One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.

Read the vendor bulletin Get alerts for cm2 postgresql 14.18-1 on CBL Mariner

5.9CVSS out of 10Medium severity

Scope

What the vendor says is affected

cm2 postgresql 14.18-1 on CBL Mariner 2.0
azl3 postgresql 16.9-1 on Azure Linux 3.0
azl3 postgresql 16.7-1 on Azure Linux 3.0
cbl2 postgresql 14.16-1 on CBL Mariner 2.0
azl3 rust 1.75.0-22 on Azure Linux 3.0
azl3 rust 1.90.0-1 on Azure Linux 3.0
azl3 rust 1.90.0-3 on Azure Linux 3.0
azl3 rust 1.90.0-4 on Azure Linux 3.0
cbl2 postgresql 14.16-1 on CBL-Mariner 2.0

Versions the vendor lists as fixed

14.18-1
16.9-1
1.90.0-4

Next step

What the vendor recommends

CBL-Mariner Releases

Review the complete instructions on the vendor's site

Timeline

When this advisory changed

Jul 11, 2025 at 12:00 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Aug 12, 2026 at 10:23 PM UTC
Updated by Microsoft Security Response Center
The vendor changed the advisory after it was first published.
Sep 28, 2026 at 11:20 AM UTC
Added to SecurityAlert
We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2025-4207View CVSS, KEV, EPSS, and threat context

Source

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Vendor: Microsoft Security Response Center
Advisory ID: CVE-2025-4207
Last source check: Sep 28, 2026 at 11:20 AM UTC

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Your environment

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Test the update or mitigation through your normal change process.

Watch cm2 postgresql 14.18-1 on CBL Mariner

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What the vendor says is affected

Versions the vendor lists as fixed

What the vendor recommends

When this advisory changed

CVEs named in this advisory

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