What is CVE-2026-31536?

CVE-2026-31536 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. smb: server: let send_done handle a completion without IB_SEND_SIGNALED

Which CVE IDs does CVE-2026-31536 cover?

CVE-2026-31536 covers the following CVE IDs: CVE-2026-31536. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-31536?

CVE-2026-31536 has a CVSS v3 base score of 7.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-31536?

CVE-2026-31536 affects 6 products, including: azl3 kernel 6.6.130.1-3 on Azure Linux 3.0; azl3 kernel 6.6.134.1-2 on Azure Linux 3.0; azl3 kernel 6.6.137.1-2 on Azure Linux 3.0; azl3 kernel 6.6.138.1-1 on Azure Linux 3.0; cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0; and others — see the full list on the advisory page.

CVE-2026-31536MediumCVSS 7.1

smb: server: let send_done handle a completion without IB_SEND_SIGNALED

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-31536 →

🎯 Affected products6

azl3 kernel 6.6.130.1-3 on Azure Linux 3.0
azl3 kernel 6.6.134.1-2 on Azure Linux 3.0
azl3 kernel 6.6.137.1-2 on Azure Linux 3.0
azl3 kernel 6.6.138.1-1 on Azure Linux 3.0
cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0
cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0

✅ Remediation

KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31536
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade