What is CVE-2025-52881?

CVE-2025-52881 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. runc: LSM labels can be bypassed with malicious config using dummy procfs files

Which CVE IDs does CVE-2025-52881 cover?

CVE-2025-52881 covers the following CVE IDs: CVE-2025-52881. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-52881?

CVE-2025-52881 has a CVSS v3 base score of 7.3, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-52881?

CVE-2025-52881 affects 6 products, including: azl3 kubernetes 1.30.10-14 on Azure Linux 3.0; azl3 kubernetes 1.30.10-16 on Azure Linux 3.0; azl3 kubernetes 1.30.10-18 on Azure Linux 3.0; azl3 runc 1.3.3-1 on Azure Linux 3.0; cbl2 kubernetes 1.28.4-19 on CBL Mariner 2.0; and others — see the full list on the advisory page.

CVE-2025-52881HighCVSS 7.3

runc: LSM labels can be bypassed with malicious config using dummy procfs files

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-52881 →

🎯 Affected products6

azl3 kubernetes 1.30.10-14 on Azure Linux 3.0
azl3 kubernetes 1.30.10-16 on Azure Linux 3.0
azl3 kubernetes 1.30.10-18 on Azure Linux 3.0
azl3 runc 1.3.3-1 on Azure Linux 3.0
cbl2 kubernetes 1.28.4-19 on CBL Mariner 2.0
cbl2 moby-runc 1.1.9-9 on CBL Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 1.2.8-1 KBCBL-Mariner Releases (Security Update) — fixed build 1.30.10-18

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-52881
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade