CVE-2020-13253Public exploit

Host process crash via unvalidated SD address

Published May 27, 2020 · Updated Aug 4, 2024

Out-of-bounds read in QEMU 4.2.0 SD card emulation allows guest OS users to crash the host QEMU process via a block write command. The sd_wp_addr function uses a guest-supplied address to index the s->wp_groups write-protect bitmap during sdhci_write() without validating that the address is in range. Access to a guest OS and its emulated SD controller is required; a crafted block write terminates the QEMU process and interrupts the virtual machine service provided by that process.

CVSS severity5.5
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in QEMU 4.2.0 SD card emulation allows guest OS users to crash the host QEMU process via a block write command. The sd_wp_addr function uses a guest-supplied address to index the s->wp_groups write-protect bitmap during sdhci_write() without validating that the address is in range. Access to a guest OS and its emulated SD controller is required; a crafted block write terminates the QEMU process and interrupts the virtual machine service provided by that process.

The record

CVE
CVE-2020-13253
Published
May 27, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:N/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application 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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