CVE-2020-17380Public exploit

Host crash or code execution via SDMA overflow

Published Jan 30, 2021 · Updated Aug 4, 2024

Heap-based buffer overflow in QEMU through 5.0.0 allows guest OS users to crash the host process or execute code through SDHCI emulation. The sdhci_sdma_transfer_multi_blocks() routine processes guest-programmed transfer lengths without keeping accesses within fifo_buffer bounds. Access to an emulated SDHCI controller is required; the out-of-bounds access crashes QEMU or executes code with the host process's privileges.

CVSS severity6.3
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in QEMU through 5.0.0 allows guest OS users to crash the host process or execute code through SDHCI emulation. The sdhci_sdma_transfer_multi_blocks() routine processes guest-programmed transfer lengths without keeping accesses within fifo_buffer bounds. Access to an emulated SDHCI controller is required; the out-of-bounds access crashes QEMU or executes code with the host process's privileges.

The record

CVE
CVE-2020-17380
Published
Jan 30, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 30, 2021CVE 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

6.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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