What is CVE-2026-88806?

CVE-2026-88806 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. libX11 XkbGetMap Reply Heap-based Buffer Overflow

Which CVE IDs does CVE-2026-88806 cover?

CVE-2026-88806 covers the following CVE IDs: CVE-2026-88806. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-88806?

CVE-2026-88806 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-88806?

CVE-2026-88806 affects 1 product, including: azl3 libX11 1.8.7-1 on Azure Linux 3.0.

CVE-2026-88806HighCVSS 7.5

libX11 XkbGetMap Reply Heap-based Buffer Overflow

Vendor

Microsoft Security Response Center (MSRC)

Published

September 22, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-88806 →

🎯 Affected products1

azl3 libX11 1.8.7-1 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update) — fixed build 1.8.7-2

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88806
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade