CVE-2020-3691Network attack vector

Out-of-bounds memory access via audio integer underflow

Published Jan 21, 2021 · Updated Aug 4, 2024

Out-of-bounds memory access in Qualcomm Snapdragon audio components allows remote attackers to corrupt memory via modified content. The closed-source audio path underflows an integer while processing the content, causing an access outside the intended memory bounds. No privileges or user interaction are required, but public sources do not establish whether exploitation yields code execution, disclosure, or only a crash.

CVSS severity9.8
Critical
EPSS probability1.05%
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 memory access in Qualcomm Snapdragon audio components allows remote attackers to corrupt memory via modified content. The closed-source audio path underflows an integer while processing the content, causing an access outside the intended memory bounds. No privileges or user interaction are required, but public sources do not establish whether exploitation yields code execution, disclosure, or only a crash.

The record

CVE
CVE-2020-3691
Published
Jan 21, 2021
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-191
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=APQ8009, APQ8009W, APQ8017, APQ8030, APQ8037, APQ8052, APQ8053, APQ8056, APQ8060A, APQ8062, APQ8064, APQ8064AU, APQ8076, APQ8084, APQ8096AU, AQT1000, AR6003, AR8031, AR8035, AR8151, AR9374, CSRA6620, CSRA6640, CSRB31024, MDM8215, MDM8215M, MDM8615M, MDM8635M, MDM9206, MDM9215, MDM9225, MDM9225M, MDM9230, MDM9235M, MDM9310, MDM9330, MDM9607, MDM9615, MDM9615M, MDM9625, MDM9625M, MDM9628, MDM9630, MDM9635M, MDM9640, MDM9645, MDM9650, MDM9655, MPQ8064, MSM8108, MSM8208, MSM8209, MSM8226, MSM8227, MSM8230, MSM8608, MSM8610, MSM8626, MSM8627, MSM8630, MSM8909W, MSM8917, MSM8920, MSM8930, MSM8937, MSM8940, MSM8952, MSM8953, MSM8956, MSM8960, MSM8960SG, MSM8962, MSM8976, MSM8976SG, MSM8996AU, PM215, PM3003A, PM4125, PM439, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM6350, PM640A, PM640L, PM640P, PM660, PM660A, PM660L, PM670, PM670A, PM670L, PM7150A, PM7150L, PM7250, PM7250B, PM7350C, PM8004, PM8005, PM8008, PM8009, PM8018, PM8019, PM8110, PM8150, PM8150A, PM8150B, PM8150C, PM8150L, PM8226, PM8 ...[truncated*]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8009, APQ8009W, APQ8017, APQ8030, APQ8037, APQ8052, APQ8053, APQ8056, APQ8060A, APQ8062, APQ8064, APQ8064AU, APQ8076, APQ8084, APQ8096AU, AQT1000, AR6003, AR8031, AR8035, AR8151, AR9374, CSRA6620, CSRA6640, CSRB31024, MDM8215, MDM8215M, MDM8615M, MDM8635M, MDM9206, MDM9215, MDM9225, MDM9225M, MDM9230, MDM9235M, MDM9310, MDM9330, MDM9607, MDM9615, MDM9615M, MDM9625, MDM9625M, MDM9628, MDM9630, MDM9635M, MDM9640, MDM9645, MDM9650, MDM9655, MPQ8064, MSM8108, MSM8208, MSM8209, MSM8226, MSM8227, MSM8230, MSM8608, MSM8610, MSM8626, MSM8627, MSM8630, MSM8909W, MSM8917, MSM8920, MSM8930, MSM8937, MSM8940, MSM8952, MSM8953, MSM8956, MSM8960, MSM8960SG, MSM8962, MSM8976, MSM8976SG, MSM8996AU, PM215, PM3003A, PM4125, PM439, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM6350, PM640A, PM640L, PM640P, PM660, PM660A, PM660L, PM670, PM670A, PM670L, PM7150A, PM7150L, PM7250, PM7250B, PM7350C, PM8004, PM8005, PM8008, PM8009, PM8018, PM8019, PM8110, PM8150, PM8150A, PM8150B, PM8150C, PM8150L, PM8226, PM8 ...[truncated*]

Published CVSS scores

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)

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

See the directory against your own environment.

Your stack

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