CVE-2014-0148

QEMU crash via malformed VHDX geometry

Published Feb 11, 2020 · Updated Aug 6, 2024

Infinite-loop denial of service in QEMU before 2.0 allows local users to crash the emulator by supplying a crafted Hyper-V VHDX image. The VHDX block driver calculates BAT entries from untrusted block_size and logical_sector_size values without bounds checks, allowing derived sectors_per_block values to drive an infinite loop. Exploitation requires the QEMU process to open an attacker-controlled image; the resulting impact is service interruption without stated confidentiality or integrity loss.

CVSS severity5.5
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Infinite-loop denial of service in QEMU before 2.0 allows local users to crash the emulator by supplying a crafted Hyper-V VHDX image. The VHDX block driver calculates BAT entries from untrusted block_size and logical_sector_size values without bounds checks, allowing derived sectors_per_block values to drive an infinite loop. Exploitation requires the QEMU process to open an attacker-controlled image; the resulting impact is service interruption without stated confidentiality or integrity loss.

The record

CVE
CVE-2014-0148
Published
Feb 11, 2020
Updated
Aug 6, 2024
Vendor
QEMU Project
Product
QEMU
Classifications
CWE-835, T1499.004
Attack vector
local
Privileges
authenticated

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 2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

QEMU Project · QEMUversion=before 2.0

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition
T1499.004Application 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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