CVE-2020-0086Network attack vector

Code execution via Parcel cursor underflow

Published Mar 15, 2020 · Updated Aug 4, 2024

Out-of-bounds write in Android 10 libbinder allows remote attackers to execute code via a malformed Parcel when IntSan is disabled. Parcel::readCString subtracts mDataPos from mDataSize before confirming that the cursor remains within the buffer, so an invalid cursor wraps the available-length calculation and permits access beyond the Parcel bounds. Exploitation requires IntSan to be disabled, contrary to the default configuration; no additional execution privileges or user interaction are required.

CVSS severity9.8
Critical
EPSS probability0.64%
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 write in Android 10 libbinder allows remote attackers to execute code via a malformed Parcel when IntSan is disabled. Parcel::readCString subtracts mDataPos from mDataSize before confirming that the cursor remains within the buffer, so an invalid cursor wraps the available-length calculation and permits access beyond the Parcel bounds. Exploitation requires IntSan to be disabled, contrary to the default configuration; no additional execution privileges or user interaction are required.

The record

CVE
CVE-2020-0086
Published
Mar 15, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-787, CWE-190, T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 15, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Android-10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=Android-10

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-190Integer Overflow or Wraparound
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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