CVE-2020-11258Public exploit

TrustZone code execution via unchecked output pointer

Published Jun 9, 2021 · Updated Aug 4, 2024

Memory corruption in Qualcomm Snapdragon Wired Infrastructure and Networking allows local attackers to execute code in TrustZone. The tzbsp_version_set SMC handler dereferences arg3 as an output pointer without confirming that it addresses only nonsecure REE memory, enabling restricted-value writes to arbitrary QSEE addresses. Issuing the required Secure Monitor Call directly requires kernel-level execution, although an exposed driver can make the flaw reachable from an unprivileged application.

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 Qualcomm Snapdragon Wired Infrastructure and Networking allows local attackers to execute code in TrustZone. The tzbsp_version_set SMC handler dereferences arg3 as an output pointer without confirming that it addresses only nonsecure REE memory, enabling restricted-value writes to arbitrary QSEE addresses. Issuing the required Secure Monitor Call directly requires kernel-level execution, although an exposed driver can make the flaw reachable from an unprivileged application.

The record

CVE
CVE-2020-11258
Published
Jun 9, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-823, CWE-119, 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

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
9.3QualcommCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-823Use of Out-of-range Pointer Offset
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1068Exploitation for Privilege Escalation

Public exploit references

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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