CVE-2014-0147

Host process crash via block-driver arithmetic errors

Published Feb 11, 2020 · Updated Aug 6, 2024

Denial of service in QEMU before 1.6.2 allows local users who can alter a loaded disk image to crash the host QEMU process. The Bochs driver stores image offsets and sizes in signed variables, while QCOW2 snapshot allocation incorrectly calls update_refcount() after relying on free_cluster_index. The attacker must control an image attached to a guest; exploitation interrupts that QEMU instance and can corrupt host process memory.

CVSS severity6.2
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in QEMU before 1.6.2 allows local users who can alter a loaded disk image to crash the host QEMU process. The Bochs driver stores image offsets and sizes in signed variables, while QCOW2 snapshot allocation incorrectly calls update_refcount() after relying on free_cluster_index. The attacker must control an image attached to a guest; exploitation interrupts that QEMU instance and can corrupt host process memory.

The record

CVE
CVE-2014-0147
Published
Feb 11, 2020
Updated
Aug 6, 2024
Vendor
QEMU Project
Product
QEMU
Classifications
CWE-190, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record 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=before 1.6.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

QEMU Project · QEMUversion=before 1.6.2

Published CVSS scores

6.2NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1499.004Application or System Exploitation

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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