CVE-2025-58148

Guest-to-host compromise via wild vCPU pointer

Published Oct 31, 2025 · Updated Nov 4, 2025

Out-of-bounds access in Xen 4.15 and newer allows guest OS users to elevate privileges on or crash an x86 host via Viridian hypercalls. send_ipi() uses a guest-supplied vCPU mask to index d->vcpu[] without sufficient bounds checks and operates on the resulting wild pointer. Only x86 HVM guests with any viridian= setting can reach the flaw; exploitation can also disclose host information or interrupt the entire host.

CVSS severity7.5
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Xen 4.15 and newer allows guest OS users to elevate privileges on or crash an x86 host via Viridian hypercalls. send_ipi() uses a guest-supplied vCPU mask to index d->vcpu[] without sufficient bounds checks and operates on the resulting wild pointer. Only x86 HVM guests with any viridian= setting can reach the flaw; exploitation can also disclose host information or interrupt the entire host.

The record

CVE
CVE-2025-58148
Published
Oct 31, 2025
Updated
Nov 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, CWE-125, T1611
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-125Out-of-bounds Read
T1611Escape to Host

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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