CVE-2020-11203

Local service interruption via oversized broadcast config

Published Feb 22, 2021 · Updated Aug 4, 2024

Out-of-bounds write in Qualcomm Snapdragon allows local users to cause service interruption via crafted GSM/WCDMA broadcast configuration data. The radio interface layer allocates a variable-length stack array from a user-supplied configuration size without bounding the size before writing, causing stack overflow. Reaching the flaw requires low-privilege local access to feed the radio configuration; the documented consequence is denial of service and possible crash, with no stated integrity impact.

CVSS severity7.1
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

Out-of-bounds write in Qualcomm Snapdragon allows local users to cause service interruption via crafted GSM/WCDMA broadcast configuration data. The radio interface layer allocates a variable-length stack array from a user-supplied configuration size without bounding the size before writing, causing stack overflow. Reaching the flaw requires low-privilege local access to feed the radio configuration; the documented consequence is denial of service and possible crash, with no stated integrity impact.

The record

CVE
CVE-2020-11203
Published
Feb 22, 2021
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 22, 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=APQ8009W, APQ8064AU, APQ8096AU, AQT1000, MSM8909W, MSM8996AU, PM215, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM640A, PM640L, PM640P, PM670, PM670L, PM8004, PM8005, PM8008, PM8009, PM855, PM855B, PM855L, PM855P, PM8916, PM8998, PMI632, PMI8998, PMK8002, PMM6155AU, PMM8155AU, PMM8195AU, PMM855AU, PMM8996AU, PMR735A, PMW3100, PMX50, PMX55, QAT3518, QAT3519, QAT3522, QAT3550, QAT3555, QAT5515, QAT5516, QBT1500, QBT2000, QCA6391, QCA6420, QCA6430, QCA6564, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6595, QCA6595AU, QCA6696, QCA8337, QCS605, QDM2301, QDM2302, QET4101, QET5100, QPA4360, QPA4361, QPA5460, QPA6560, QSW6310, QSW8573, QSW8574, QTC410S, QTC800H, QTC800S, QTC801S, QTM525, QTM527, Qualcomm215, RGR7640AU, SA6145P, SA6150P, SA6155P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD429, SD665, SD675, SD720G, SD730, SD855, SDA429W, SDM429W, SDM830, SDR051, SDR052, SDR660, SDR660G, SDR675, SDR8150, SDR865, SDW3100, SDX50M, SDX55, SDX55M, SM6250, SMB1355, SMB1381, SMB1390, SMB231, ...[truncated*]

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8009W, APQ8064AU, APQ8096AU, AQT1000, MSM8909W, MSM8996AU, PM215, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM640A, PM640L, PM640P, PM670, PM670L, PM8004, PM8005, PM8008, PM8009, PM855, PM855B, PM855L, PM855P, PM8916, PM8998, PMI632, PMI8998, PMK8002, PMM6155AU, PMM8155AU, PMM8195AU, PMM855AU, PMM8996AU, PMR735A, PMW3100, PMX50, PMX55, QAT3518, QAT3519, QAT3522, QAT3550, QAT3555, QAT5515, QAT5516, QBT1500, QBT2000, QCA6391, QCA6420, QCA6430, QCA6564, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6595, QCA6595AU, QCA6696, QCA8337, QCS605, QDM2301, QDM2302, QET4101, QET5100, QPA4360, QPA4361, QPA5460, QPA6560, QSW6310, QSW8573, QSW8574, QTC410S, QTC800H, QTC800S, QTC801S, QTM525, QTM527, Qualcomm215, RGR7640AU, SA6145P, SA6150P, SA6155P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD429, SD665, SD675, SD720G, SD730, SD855, SDA429W, SDM429W, SDM830, SDR051, SDR052, SDR660, SDR660G, SDR675, SDR8150, SDR865, SDW3100, SDX50M, SDX55, SDX55M, SM6250, SMB1355, SMB1381, SMB1390, SMB231, ...[truncated*]

Published CVSS scores

7.1NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
3.6NVDAV:L/AC:L/Au:N/C:P/I:N/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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