CVE-2019-20776

Trusted-application crash via unchecked HLOS offsets

Published Apr 17, 2020 · Updated Aug 5, 2024

Buffer over-read in the dxhdcp2 trustlet on LG Android 7.0 through 8.1 devices allows local users to crash the trusted application. The trustlet fails to validate data offsets supplied by the high-level operating system before reading memory outside the intended bounds. Local access capable of supplying crafted HLOS input is required, and the documented consequence is limited to crashing the trusted application.

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

Buffer over-read in the dxhdcp2 trustlet on LG Android 7.0 through 8.1 devices allows local users to crash the trusted application. The trustlet fails to validate data offsets supplied by the high-level operating system before reading memory outside the intended bounds. Local access capable of supplying crafted HLOS input is required, and the documented consequence is limited to crashing the trusted application.

The record

CVE
CVE-2019-20776
Published
Apr 17, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

2.1NVDAV:L/AC:L/Au:N/C:N/I:N/A:P
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

T1499.004Endpoint Denial of Service: Application 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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