CVE-2025-54567

Virtual function state corruption via ignored write mask

Published Jul 25, 2025 · Updated Jul 25, 2025

Incorrect state management in QEMU 10.0.0 through 10.0.3 allows guest OS users to corrupt virtual-function state via PCIe SR-IOV writes. The pcie_sriov_config_write function treats its input value as already masked, so it processes VF Enable even when the configured write mask blocks that bit. Reachability requires guest access to an emulated SR-IOV physical function; crafted configuration writes cause incorrect virtual-function registration or removal.

CVSS severity4.2
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect state management in QEMU 10.0.0 through 10.0.3 allows guest OS users to corrupt virtual-function state via PCIe SR-IOV writes. The pcie_sriov_config_write function treats its input value as already masked, so it processes VF Enable even when the configured write mask blocks that bit. Reachability requires guest access to an emulated SR-IOV physical function; crafted configuration writes cause incorrect virtual-function registration or removal.

The record

CVE
CVE-2025-54567
Published
Jul 25, 2025
Updated
Jul 25, 2025
Vendor
QEMU Project
Product
QEMU
Classifications
CWE-684
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.0 <=10.0.3

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

QEMU Project · QEMUversion=10.0.0 <=10.0.3

Published CVSS scores

5.4NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
4.2MITRECVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-684Incorrect Provision of Specified Function

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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