CVE-2022-2962Public exploit

Guest-triggered denial of service via DMA reentrancy

Published Sep 13, 2022 · Updated Apr 23, 2025

DMA reentrancy in QEMU Tulip device emulation through 7.1.0 allows guest OS users to crash the host QEMU process via crafted descriptors. Tulip descriptor and frame-copy paths accept DMA destinations within the device's own MMIO region, recursively invoking handlers until stack or heap exhaustion. The Tulip PCI device must be configured and controlled by a guest; successful exploitation terminates that QEMU process rather than the host operating system.

CVSS severity7.8
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DMA reentrancy in QEMU Tulip device emulation through 7.1.0 allows guest OS users to crash the host QEMU process via crafted descriptors. Tulip descriptor and frame-copy paths accept DMA destinations within the device's own MMIO region, recursively invoking handlers until stack or heap exhaustion. The Tulip PCI device must be configured and controlled by a guest; successful exploitation terminates that QEMU process rather than the host operating system.

The record

CVE
CVE-2022-2962
Published
Sep 13, 2022
Updated
Apr 23, 2025
Vendor
QEMU Project
Product
QEMU
Classifications
CWE-662, CWE-400, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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?

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  1. Affected versionversion=Will be fixed in QEMU 7.2.0-rc0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

QEMU Project · QEMUversion=Will be fixed in QEMU 7.2.0-rc0

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-662Improper Synchronization
CWE-400Uncontrolled Resource Consumption
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

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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