CVE-2020-11199

EL3 stack-canary disclosure via mappable IMEM

Published Mar 17, 2021 · Updated Aug 4, 2024

Improper access control in Qualcomm Snapdragon QTEE allows local users to disclose the EL3 stack canary by mapping the IMEM region. QTEE leaves the IMEM region mappable from the high-level operating system, exposing an EL3 stack-canary value across the privilege boundary. Local code execution in the HLOS is required, and the documented consequence is disclosure of the canary without integrity or availability impact.

CVSS severity7.1
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Qualcomm Snapdragon QTEE allows local users to disclose the EL3 stack canary by mapping the IMEM region. QTEE leaves the IMEM region mappable from the high-level operating system, exposing an EL3 stack-canary value across the privilege boundary. Local code execution in the HLOS is required, and the documented consequence is disclosure of the canary without integrity or availability impact.

The record

CVE
CVE-2020-11199
Published
Mar 17, 2021
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-200
Attack vector
local
Privileges
unauthenticated

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?

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

  1. Affected versionversion=APQ8009, APQ8017, APQ8037, APQ8053, APQ8064AU, APQ8096AU, AQT1000, AR8031, AR8035, AR8151, CSR8811, CSRA6620, CSRA6640, CSRB31024, FSM10055, FSM10056, IPQ6000, IPQ6005, IPQ6010, IPQ6018, IPQ6028, IPQ8070, IPQ8070A, IPQ8071, IPQ8071A, IPQ8072, IPQ8072A, IPQ8074, IPQ8074A, IPQ8076, IPQ8076A, IPQ8078, IPQ8078A, IPQ8173, IPQ8174, MDM8207, MDM9150, MDM9205, MDM9206, MDM9207, MDM9250, MDM9607, MDM9628, MDM9640, MDM9650, MDM9655, MSM8108, MSM8208, MSM8209, MSM8608, MSM8917, MSM8920, MSM8937, MSM8940, MSM8953, MSM8996AU, PM215, PM3003A, PM4125, PM4250, PM439, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM6350, PM640A, PM640L, PM640P, PM660, PM660A, PM660L, PM670, PM670A, PM670L, PM7150A, PM7150L, PM7250, PM7250B, PM8004, PM8005, PM8008, PM8009, PM8019, PM8150, PM8150A, PM8150B, PM8150C, PM8150L, PM8250, PM8350, PM855, PM855A, PM855B, PM855L, PM855P, PM8909, PM8916, PM8937, PM8940, PM8953, PM8996, PM8998, PMC1000H, PMD9607, PMD9655, PMD9655AU, PME605, PMI632, PMI8937, PMI8940, PMI8952, PMI8994, PM ...[truncated*]

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8009, APQ8017, APQ8037, APQ8053, APQ8064AU, APQ8096AU, AQT1000, AR8031, AR8035, AR8151, CSR8811, CSRA6620, CSRA6640, CSRB31024, FSM10055, FSM10056, IPQ6000, IPQ6005, IPQ6010, IPQ6018, IPQ6028, IPQ8070, IPQ8070A, IPQ8071, IPQ8071A, IPQ8072, IPQ8072A, IPQ8074, IPQ8074A, IPQ8076, IPQ8076A, IPQ8078, IPQ8078A, IPQ8173, IPQ8174, MDM8207, MDM9150, MDM9205, MDM9206, MDM9207, MDM9250, MDM9607, MDM9628, MDM9640, MDM9650, MDM9655, MSM8108, MSM8208, MSM8209, MSM8608, MSM8917, MSM8920, MSM8937, MSM8940, MSM8953, MSM8996AU, PM215, PM3003A, PM4125, PM4250, PM439, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM6350, PM640A, PM640L, PM640P, PM660, PM660A, PM660L, PM670, PM670A, PM670L, PM7150A, PM7150L, PM7250, PM7250B, PM8004, PM8005, PM8008, PM8009, PM8019, PM8150, PM8150A, PM8150B, PM8150C, PM8150L, PM8250, PM8350, PM855, PM855A, PM855B, PM855L, PM855P, PM8909, PM8916, PM8937, PM8940, PM8953, PM8996, PM8998, PMC1000H, PMD9607, PMD9655, PMD9655AU, PME605, PMI632, PMI8937, PMI8940, PMI8952, PMI8994, PM ...[truncated*]

Published CVSS scores

7.1QualcommCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

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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