What is CVE-2026-102633?

CVE-2026-102633 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. libexpat 2.7.2 through 2.8.5 Integer Overflow in expat_realloc

Which CVE IDs does CVE-2026-102633 cover?

CVE-2026-102633 covers the following CVE IDs: CVE-2026-102633. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-102633?

CVE-2026-102633 has a CVSS v3 base score of 5.9, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-102633?

CVE-2026-102633 affects 1 product, including: azl3 expat 2.8.3-2 on Azure Linux 3.0.

CVE-2026-102633MediumCVSS 5.9

libexpat 2.7.2 through 2.8.5 Integer Overflow in expat_realloc

Vendor

Microsoft Security Response Center (MSRC)

Published

October 1, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-102633 →

🎯 Affected products1

azl3 expat 2.8.3-2 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102633
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade