fs_read_glyphs() heap OOB read/write via encoding array index mismatch in libXfont2

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Read the vendor bulletin Get alerts for azl3 libXfont2 2.0.8-1 on Azure Linux

9.0CVSS out of 10High severity

Scope

What the vendor says is affected

azl3 libXfont2 2.0.8-1 on Azure Linux 3.0

Next step

What the vendor recommends

See the Microsoft Security Update Guide for the update that applies to your product.

Review the complete instructions on the vendor's site

Timeline

When this advisory changed

Sep 17, 2026 at 1:02 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Sep 17, 2026 at 10:05 AM UTC
Added to SecurityAlert
We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-59679View CVSS, KEV, EPSS, and threat context

Source

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Vendor: Microsoft Security Response Center
Advisory ID: CVE-2026-59679
Last source check: Sep 17, 2026 at 4:10 PM UTC

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Your environment

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Test the update or mitigation through your normal change process.

Watch azl3 libXfont2 2.0.8-1 on Azure Linux

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What the vendor says is affected

What the vendor recommends

When this advisory changed

CVEs named in this advisory

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