What is CVE-2026-85509?

CVE-2026-85509 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. FreeIPMI before 1.6.19 has a stack-based buffer overflow in _read_fru_data in libfreeipmi/fru/ipmi-fru.c when a BMC returns more bytes than requested.

Which CVE IDs does CVE-2026-85509 cover?

CVE-2026-85509 covers the following CVE IDs: CVE-2026-85509. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-85509?

CVE-2026-85509 has a CVSS v3 base score of 9.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-85509?

CVE-2026-85509 affects 1 product, including: azl3 freeipmi 1.6.18-1 on Azure Linux 3.0.

CVE-2026-85509CriticalCVSS 9.8

FreeIPMI before 1.6.19 has a stack-based buffer overflow in _read_fru_data in libfreeipmi/fru/ipmi-fru.c when a BMC returns more bytes than requested.

Vendor

Microsoft Security Response Center (MSRC)

Published

September 11, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-85509 →

🎯 Affected products1

azl3 freeipmi 1.6.18-1 on Azure Linux 3.0

✅ Remediation

Security Update — fixed build 1.6.19-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85509
patchhttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade