What is CVE-2026-58058?

CVE-2026-58058 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Nmap - Integer Underflow in IPv6 Extension Header Parsing

Which CVE IDs does CVE-2026-58058 cover?

CVE-2026-58058 covers the following CVE IDs: CVE-2026-58058. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-58058?

CVE-2026-58058 has a CVSS v3 base score of 6.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-58058?

CVE-2026-58058 affects 3 products, including: azl3 nmap 7.95-3 on Azure Linux 3.0; azl3 nmap 7.95-4 on Azure Linux 3.0; azl4 nmap 4:7.92-12.azl4 on Azure Linux 4.0.

CVE-2026-58058MediumCVSS 6.5

Nmap - Integer Underflow in IPv6 Extension Header Parsing

Vendor

Microsoft Security Response Center (MSRC)

Published

June 30, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-58058 →

🎯 Affected products3

azl3 nmap 7.95-3 on Azure Linux 3.0
azl3 nmap 7.95-4 on Azure Linux 3.0
azl4 nmap 4:7.92-12.azl4 on Azure Linux 4.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 7.95-4 KBRelease Notes (Security Update) — fixed build 4:4:7.92-12.azl4

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58058
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade