CVE-2020-11220

Protected-data compromise via SCM pointer race

Published Mar 17, 2021 · Updated Aug 4, 2024

A TOCTOU race in Qualcomm Snapdragon storage SCM handling allows local users with high privileges to compromise protected data. The storage command handler checks a pointer, but a race window permits that pointer to become invalid before the storage SCM call executes. Exploitation requires high local privileges and a successful race; Qualcomm reports effects crossing a security boundary that can expose or alter protected data and interrupt device operation.

CVSS severity8.2
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A TOCTOU race in Qualcomm Snapdragon storage SCM handling allows local users with high privileges to compromise protected data. The storage command handler checks a pointer, but a race window permits that pointer to become invalid before the storage SCM call executes. Exploitation requires high local privileges and a successful race; Qualcomm reports effects crossing a security boundary that can expose or alter protected data and interrupt device operation.

The record

CVE
CVE-2020-11220
Published
Mar 17, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-367
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 17, 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.4National Institute of Standards and TechnologyCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
4.4National Institute of Standards and TechnologyAV:L/AC:M/Au:N/C:P/I:P/A:P
8.2Qualcomm Technologies, Inc.CVSS:3.1/AV:L/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition

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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