What is CVE-2026-89158?

CVE-2026-89158 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. PCRE2 before 10.48, on 32-bit platforms, has a pcre2_compile_32 integer overflow and resultant out-of-bounds write.

Which CVE IDs does CVE-2026-89158 cover?

CVE-2026-89158 covers the following CVE IDs: CVE-2026-89158. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-89158?

CVE-2026-89158 has a CVSS v3 base score of 6.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-89158?

CVE-2026-89158 affects 1 product, including: azl3 pcre2 10.42-3 on Azure Linux 3.0.

CVE-2026-89158MediumCVSS 6.5

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_compile_32 integer overflow and resultant out-of-bounds write.

Vendor

Microsoft Security Response Center (MSRC)

Published

September 12, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-89158 →

🎯 Affected products1

azl3 pcre2 10.42-3 on Azure Linux 3.0

✅ Remediation

Security Update — fixed build 10.48-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89158
patchhttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade