CVE-2020-11296Network attack vector

Service interruption via NOA IE arithmetic overflow

Published Feb 22, 2021 · Updated Aug 4, 2024

Arithmetic overflow in Qualcomm Snapdragon WLAN firmware allows remote attackers to interrupt service via a crafted NOA IE. The closed-source firmware mishandles an error while processing the Notice of Absence information element, allowing arithmetic to overflow. Reachability requires delivery of the malformed wireless element to an affected chipset; public sources do not identify the exact crashing operation or recovery behavior.

CVSS severity7.5
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arithmetic overflow in Qualcomm Snapdragon WLAN firmware allows remote attackers to interrupt service via a crafted NOA IE. The closed-source firmware mishandles an error while processing the Notice of Absence information element, allowing arithmetic to overflow. Reachability requires delivery of the malformed wireless element to an affected chipset; public sources do not identify the exact crashing operation or recovery behavior.

The record

CVE
CVE-2020-11296
Published
Feb 22, 2021
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-617, T1464
Attack vector
network
Privileges
unauthenticated

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

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, APQ8017, APQ8053, APQ8064AU, APQ8076, APQ8084, APQ8092, APQ8094, APQ8096AU, AQT1000, AR8031, AR8035, AR8151, AR9380, CSR6030, CSR8811, CSRA6620, CSRA6640, CSRB31024, IPQ4018, IPQ4019, IPQ4028, IPQ4029, IPQ5010, IPQ5018, IPQ6000, IPQ6005, IPQ6010, IPQ6018, IPQ6028, IPQ8064, IPQ8065, IPQ8068, IPQ8069, IPQ8070, IPQ8070A, IPQ8071, IPQ8071A, IPQ8072, IPQ8072A, IPQ8074, IPQ8074A, IPQ8076, IPQ8076A, IPQ8078, IPQ8078A, IPQ8173, IPQ8174, MDM8215, MDM9206, MDM9215, MDM9225, MDM9225M, MDM9230, MDM9235M, MDM9250, MDM9310, MDM9330, MDM9607, MDM9615, MDM9625, MDM9625M, MDM9626, MDM9628, MDM9630, MDM9635M, MDM9640, MDM9645, MDM9650, MDM9655, MSM8976, MSM8992, MSM8994, MSM8996AU, PM3003A, PM4125, PM4250, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM6350, PM640A, PM640L, PM640P, PM660, PM660A, PM660L, PM670, PM670A, PM670L, PM7150A, PM7150L, PM7250, PM7250B, PM8004, PM8005, PM8008, PM8009, PM8018, PM8019, PM8150, PM8150A, PM8150B, PM8150C, PM8150L, PM8250, PM8350, PM8350B, PM8350BH, PM8350C, PM8 ...[truncated*]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8009, APQ8017, APQ8053, APQ8064AU, APQ8076, APQ8084, APQ8092, APQ8094, APQ8096AU, AQT1000, AR8031, AR8035, AR8151, AR9380, CSR6030, CSR8811, CSRA6620, CSRA6640, CSRB31024, IPQ4018, IPQ4019, IPQ4028, IPQ4029, IPQ5010, IPQ5018, IPQ6000, IPQ6005, IPQ6010, IPQ6018, IPQ6028, IPQ8064, IPQ8065, IPQ8068, IPQ8069, IPQ8070, IPQ8070A, IPQ8071, IPQ8071A, IPQ8072, IPQ8072A, IPQ8074, IPQ8074A, IPQ8076, IPQ8076A, IPQ8078, IPQ8078A, IPQ8173, IPQ8174, MDM8215, MDM9206, MDM9215, MDM9225, MDM9225M, MDM9230, MDM9235M, MDM9250, MDM9310, MDM9330, MDM9607, MDM9615, MDM9625, MDM9625M, MDM9626, MDM9628, MDM9630, MDM9635M, MDM9640, MDM9645, MDM9650, MDM9655, MSM8976, MSM8992, MSM8994, MSM8996AU, PM3003A, PM4125, PM4250, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM6350, PM640A, PM640L, PM640P, PM660, PM660A, PM660L, PM670, PM670A, PM670L, PM7150A, PM7150L, PM7250, PM7250B, PM8004, PM8005, PM8008, PM8009, PM8018, PM8019, PM8150, PM8150A, PM8150B, PM8150C, PM8150L, PM8250, PM8350, PM8350B, PM8350BH, PM8350C, PM8 ...[truncated*]

Published CVSS scores

5.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1464Network Denial of Service

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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