CVE-2022-3872

Host process crash via SDHCI off-by-one access

Published Nov 7, 2022 · Updated May 5, 2025

Off-by-one access in QEMU 7.1.0-rc4 and earlier allows guest OS users to crash the host process through the emulated SDHCI device. When data_count equals block_size, sdhci_read_dataport and sdhci_write_dataport perform an extra Buffer Data Port access beyond the configured block. Exploitation requires control of a guest with the emulated SDHCI controller and interrupts its QEMU host process without reported disclosure or code execution.

CVSS severity8.6
High
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Off-by-one access in QEMU 7.1.0-rc4 and earlier allows guest OS users to crash the host process through the emulated SDHCI device. When data_count equals block_size, sdhci_read_dataport and sdhci_write_dataport perform an extra Buffer Data Port access beyond the configured block. Exploitation requires control of a guest with the emulated SDHCI controller and interrupts its QEMU host process without reported disclosure or code execution.

The record

CVE
CVE-2022-3872
Published
Nov 7, 2022
Updated
May 5, 2025
Vendor
QEMU Project
Product
QEMU
Classifications
CWE-193, T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 7, 2022CVE publishedPublication date reported by the CVE source.
  2. May 5, 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=Affected: up to latest v7.1.0-rc4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

QEMU Project · QEMUversion=Affected: up to latest v7.1.0-rc4

Published CVSS scores

8.6cve.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
8.6NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
6.0Red HatCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/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.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-193Off-by-one Error
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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