CVE-2021-30351Network attack vector

Memory corruption via unvalidated audio frame count

Published Jan 3, 2022 · Updated Aug 3, 2024

Out-of-bounds memory access in Qualcomm Snapdragon audio firmware allows remote attackers to corrupt memory during music playback. The closed-source audio component accepts an attacker-controlled frame count without adequate validation and uses it to access memory beyond the intended buffer. Network access without authentication or user interaction is sufficient; successful exploitation can disclose or modify data or interrupt playback.

CVSS severity9.8
Critical
EPSS probability4.02%
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 firmware allows remote attackers to corrupt memory during music playback. The closed-source audio component accepts an attacker-controlled frame count without adequate validation and uses it to access memory beyond the intended buffer. Network access without authentication or user interaction is sufficient; successful exploitation can disclose or modify data or interrupt playback.

The record

CVE
CVE-2021-30351
Published
Jan 3, 2022
Updated
Aug 3, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-120
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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, AQT1000, AR8031, AR8035, AR9380, CSR8811, CSRA6620, CSRA6640, CSRB31024, FSM10055, FSM10056, IPQ4018, IPQ4028, IPQ4029, IPQ6000, IPQ6010, IPQ6018, IPQ6028, IPQ8064, IPQ8065, IPQ8068, IPQ8070, IPQ8070A, IPQ8071, IPQ8071A, IPQ8072, IPQ8072A, IPQ8074, IPQ8074A, IPQ8076, IPQ8076A, IPQ8078A, IPQ8173, IPQ8174, MDM9150, MDM9206, MDM9250, MDM9607, MDM9628, MSM8909W, MSM8996AU, QCA4024, QCA6174A, QCA6390, QCA6391, QCA6426, QCA6428, QCA6436, QCA6438, QCA6564, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595AU, QCA6696, QCA7500, QCA8075, QCA8081, QCA8337, QCA9367, QCA9377, QCA9880, QCA9886, QCA9888, QCA9889, QCA9898, QCA9980, QCA9984, QCA9985, QCA9990, QCA9992, QCA9994, QCM2290, QCM4290, QCM6490, QCN5022, QCN5024, QCN5052, QCN5064, QCN5122, QCN5124, QCN5152, QCN5164, QCN5550, QCN9000, QCN9074, QCS2290, QCS405, QCS410, QCS4290, QCS603, QCS605, QCS610, QCS6490, QCX315, QET4101, QRB5165, QRB5165N, QSM8250, QSW8573, Qualcomm215, SA415M, SA515M, SA6145P, SA6150 ...[truncated*]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8009, APQ8009W, APQ8017, AQT1000, AR8031, AR8035, AR9380, CSR8811, CSRA6620, CSRA6640, CSRB31024, FSM10055, FSM10056, IPQ4018, IPQ4028, IPQ4029, IPQ6000, IPQ6010, IPQ6018, IPQ6028, IPQ8064, IPQ8065, IPQ8068, IPQ8070, IPQ8070A, IPQ8071, IPQ8071A, IPQ8072, IPQ8072A, IPQ8074, IPQ8074A, IPQ8076, IPQ8076A, IPQ8078A, IPQ8173, IPQ8174, MDM9150, MDM9206, MDM9250, MDM9607, MDM9628, MSM8909W, MSM8996AU, QCA4024, QCA6174A, QCA6390, QCA6391, QCA6426, QCA6428, QCA6436, QCA6438, QCA6564, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595AU, QCA6696, QCA7500, QCA8075, QCA8081, QCA8337, QCA9367, QCA9377, QCA9880, QCA9886, QCA9888, QCA9889, QCA9898, QCA9980, QCA9984, QCA9985, QCA9990, QCA9992, QCA9994, QCM2290, QCM4290, QCM6490, QCN5022, QCN5024, QCN5052, QCN5064, QCN5122, QCN5124, QCN5152, QCN5164, QCN5550, QCN9000, QCN9074, QCS2290, QCS405, QCS410, QCS4290, QCS603, QCS605, QCS610, QCS6490, QCX315, QET4101, QRB5165, QRB5165N, QSM8250, QSW8573, Qualcomm215, SA415M, SA515M, SA6145P, SA6150 ...[truncated*]

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8Qualcomm, Inc.CVSS: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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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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