CVE-2019-20779

Local TrustZone crash via crafted input

Published Apr 17, 2020 · Updated Aug 5, 2024

Denial of service in LG mobile devices running Android 7.0 through 9.0 allows local users to crash a TrustZone trusted application via crafted input. The affected TrustZone trusted application processes crafted input and crashes; public records do not identify the specific validation flaw or entry point. Exploitation requires local access to an LG device and results in application-level availability loss, with no disclosed confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.13%
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 LG mobile devices running Android 7.0 through 9.0 allows local users to crash a TrustZone trusted application via crafted input. The affected TrustZone trusted application processes crafted input and crashes; public records do not identify the specific validation flaw or entry point. Exploitation requires local access to an LG device and results in application-level availability loss, with no disclosed confidentiality or integrity impact.

The record

CVE
CVE-2019-20779
Published
Apr 17, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 17, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.1NVDAV: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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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