CVE-2020-11178

Protected-memory overwrite via incomplete physical-address checks

Published Jun 9, 2021 · Updated Aug 4, 2024

Improper address validation in Qualcomm Snapdragon platforms allows local users to overwrite another use case's CPZ memory. TrustZone checks only whether a supplied physical address overlaps its own memory or Root of Trust memory, leaving other use cases' CPZ ranges unprotected. Reachability requires code executing as a trusted application; a successful write crosses isolation boundaries and corrupts security-sensitive state.

CVSS severity8.4
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper address validation in Qualcomm Snapdragon platforms allows local users to overwrite another use case's CPZ memory. TrustZone checks only whether a supplied physical address overlaps its own memory or Root of Trust memory, leaving other use cases' CPZ ranges unprotected. Reachability requires code executing as a trusted application; a successful write crosses isolation boundaries and corrupts security-sensitive state.

The record

CVE
CVE-2020-11178
Published
Jun 9, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
8.4QualcommCVSS:3.1/AV:L/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
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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