What is CVE-2025-55159?

CVE-2025-55159 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. slab allows out-of-bounds access in `get_disjoint_mut` due to incorrect bounds check

Which CVE IDs does CVE-2025-55159 cover?

CVE-2025-55159 covers the following CVE IDs: CVE-2025-55159. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2025-55159?

CVE-2025-55159 affects 4 products, including: azl3 rust 1.75.0-22 on Azure Linux 3.0; azl3 rust 1.90.0-1 on Azure Linux 3.0; azl3 rust 1.90.0-3 on Azure Linux 3.0; azl3 rust 1.90.0-4 on Azure Linux 3.0.

CVE-2025-55159Medium

slab allows out-of-bounds access in `get_disjoint_mut` due to incorrect bounds check

Vendor

Microsoft Security Response Center (MSRC)

Published

January 21, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2025-55159 →

🎯 Affected products4

azl3 rust 1.75.0-22 on Azure Linux 3.0
azl3 rust 1.90.0-1 on Azure Linux 3.0
azl3 rust 1.90.0-3 on Azure Linux 3.0
azl3 rust 1.90.0-4 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 1.90.0-4

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55159
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade