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Microsoft Security Response CenterCVE-2026-0031

In multiple functions of mem_protect.c, there is a possible out of bounds write due to an integer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Mariner

Read the vendor bulletin Get alerts for cbl2 hyperv-daemons 5.15.200.1-1 on CBL Mariner
8.4CVSS out of 10High severity
Scope

What the vendor says is affected

  • cbl2 hyperv-daemons 5.15.200.1-1 on CBL Mariner 2.0
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-0031View CVSS, KEV, EPSS, and threat context
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