What is CVE-2026-32241?

CVE-2026-32241 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Flannel vulnerable to cross-node remote code execution via extension backend BackendData injection

Which CVE IDs does CVE-2026-32241 cover?

CVE-2026-32241 covers the following CVE IDs: CVE-2026-32241. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-32241?

CVE-2026-32241 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-32241?

CVE-2026-32241 affects 4 products, including: azl3 flannel 0.24.2-24 on Azure Linux 3.0; azl3 flannel 0.24.2-26 on Azure Linux 3.0; cbl2 flannel 0.14.0-30 on CBL Mariner 2.0; cbl2 flannel 0.14.0-30 on CBL-Mariner 2.0.

CVE-2026-32241HighCVSS 7.5

Flannel vulnerable to cross-node remote code execution via extension backend BackendData injection

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-32241 →

🎯 Affected products4

azl3 flannel 0.24.2-24 on Azure Linux 3.0
azl3 flannel 0.24.2-26 on Azure Linux 3.0
cbl2 flannel 0.14.0-30 on CBL Mariner 2.0
cbl2 flannel 0.14.0-30 on CBL-Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 0.24.2-25 KBRelease Notes (Security Update) — fixed build 0.14.0-31 KBCBL-Mariner Releases (Security Update) — fixed build 0.14.0-31

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32241
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade