CVE-2026-20760

Service interruption via overlapping protected memory ranges

Published Aug 11, 2026 · Updated Aug 11, 2026

Improper memory-range handling in microcode for Intel Processors allows local users to interrupt system service through hypervisor access. The microcode improperly resolves overlapping protected memory ranges in Ring 0, bypassing intended memory isolation during hypervisor operations. Exploitation requires local access and privileged hypervisor-level execution, and the documented consequence is interruption of the vulnerable system.

CVSS severity6.8
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper memory-range handling in microcode for Intel Processors allows local users to interrupt system service through hypervisor access. The microcode improperly resolves overlapping protected memory ranges in Ring 0, bypassing intended memory isolation during hypervisor operations. Exploitation requires local access and privileged hypervisor-level execution, and the documented consequence is interruption of the vulnerable system.

The record

CVE
CVE-2026-20760
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1260, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8Intel CorporationCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1260Improper Handling of Overlap Between Protected Memory Ranges
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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