CVE-2024-31142Network attack vector

Cross-guest memory disclosure via inactive speculation barriers

Published May 16, 2024 · Updated Nov 4, 2025

Protection failure in Xen x86 speculative controls allows guest OS users to infer host or other-guest memory on susceptible AMD CPUs. The speculative-control initialization logic fails to activate the intended IBPB-on-entry barrier, leaving the BTC and SRSO protections ineffective. Exploitation requires an untrusted guest and susceptible AMD hardware; the resulting side channel is limited to indirect memory disclosure.

CVSS severity7.5
High
EPSS probability17.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protection failure in Xen x86 speculative controls allows guest OS users to infer host or other-guest memory on susceptible AMD CPUs. The speculative-control initialization logic fails to activate the intended IBPB-on-entry barrier, leaving the BTC and SRSO protections ineffective. Exploitation requires an untrusted guest and susceptible AMD hardware; the resulting side channel is limited to indirect memory disclosure.

The record

CVE
CVE-2024-31142
Published
May 16, 2024
Updated
Nov 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-693
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 16, 2024CVE 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 vectornetwork
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:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-693Protection Mechanism Failure

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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