CVE-2020-11259

TrustZone memory corruption via unchecked pointer arguments

Published Jun 9, 2021 · Updated Aug 4, 2024

Memory corruption in TrustZone BSP for Qualcomm Snapdragon Wired Infrastructure and Networking allows local users to corrupt secure firmware memory. The BSP accepts pointer arguments without validating that their offsets remain within the permitted memory range before dereferencing them. Unauthenticated local access is sufficient; Qualcomm does not disclose whether exploitation yields code execution, data access, or only a service interruption.

CVSS severity9.3
Critical
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in TrustZone BSP for Qualcomm Snapdragon Wired Infrastructure and Networking allows local users to corrupt secure firmware memory. The BSP accepts pointer arguments without validating that their offsets remain within the permitted memory range before dereferencing them. Unauthenticated local access is sufficient; Qualcomm does not disclose whether exploitation yields code execution, data access, or only a service interruption.

The record

CVE
CVE-2020-11259
Published
Jun 9, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-823
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

8.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
9.3QualcommCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/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-823Use of Out-of-range Pointer Offset

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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