CVE-2020-11269

Adjacent memory corruption via unchecked EAPOL key length

Published Feb 22, 2021 · Updated Aug 4, 2024

Memory corruption in Qualcomm Snapdragon WLAN firmware allows physically proximate attackers to corrupt memory with crafted EAPOL frames. The WLAN frame-processing path uses an EAPOL key length without first validating it, allowing an integer overflow to reach a buffer operation. Exploitation requires wireless-network proximity and no authentication or user interaction; Qualcomm reports possible memory corruption, while the precise post-corruption outcome is undisclosed.

CVSS severity8.8
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Qualcomm Snapdragon WLAN firmware allows physically proximate attackers to corrupt memory with crafted EAPOL frames. The WLAN frame-processing path uses an EAPOL key length without first validating it, allowing an integer overflow to reach a buffer operation. Exploitation requires wireless-network proximity and no authentication or user interaction; Qualcomm reports possible memory corruption, while the precise post-corruption outcome is undisclosed.

The record

CVE
CVE-2020-11269
Published
Feb 22, 2021
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-190, T1499.004
Attack vector
adjacent
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, APQ8009W, APQ8016, APQ8017, APQ8037, APQ8039, APQ8052, APQ8053, APQ8056, APQ8064AU, APQ8076, APQ8084, APQ8092, APQ8094, APQ8096AU, AQT1000, AR8031, AR8035, AR8151, AR9380, CSR6030, CSR8811, CSRA6620, CSRA6640, CSRB31024, IPQ4018, IPQ4019, IPQ4028, IPQ4029, IPQ6010, IPQ6018, IPQ6028, IPQ8064, IPQ8065, IPQ8068, IPQ8069, IPQ8070, IPQ8070A, IPQ8071, IPQ8071A, IPQ8072, IPQ8072A, IPQ8074, IPQ8074A, IPQ8076, IPQ8076A, IPQ8078, IPQ8078A, IPQ8173, IPQ8174, MDM8215, MDM9205, MDM9206, MDM9215, MDM9225, MDM9225M, MDM9230, MDM9235M, MDM9250, MDM9310, MDM9330, MDM9607, MDM9609, MDM9615, MDM9625, MDM9625M, MDM9626, MDM9628, MDM9630, MDM9635M, MDM9640, MDM9645, MDM9650, MDM9655, MSM8108, MSM8208, MSM8209, MSM8608, MSM8909W, MSM8916, MSM8917, MSM8920, MSM8929, MSM8937, MSM8939, MSM8940, MSM8952, MSM8953, MSM8956, MSM8976, MSM8976SG, MSM8992, MSM8994, MSM8996AU, PM215, PM3003A, PM4125, PM439, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM640A, PM640L, PM640P, PM660, PM660A, PM660L, PM670, PM670A, ...[truncated*]

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8009, APQ8009W, APQ8016, APQ8017, APQ8037, APQ8039, APQ8052, APQ8053, APQ8056, APQ8064AU, APQ8076, APQ8084, APQ8092, APQ8094, APQ8096AU, AQT1000, AR8031, AR8035, AR8151, AR9380, CSR6030, CSR8811, CSRA6620, CSRA6640, CSRB31024, IPQ4018, IPQ4019, IPQ4028, IPQ4029, IPQ6010, IPQ6018, IPQ6028, IPQ8064, IPQ8065, IPQ8068, IPQ8069, IPQ8070, IPQ8070A, IPQ8071, IPQ8071A, IPQ8072, IPQ8072A, IPQ8074, IPQ8074A, IPQ8076, IPQ8076A, IPQ8078, IPQ8078A, IPQ8173, IPQ8174, MDM8215, MDM9205, MDM9206, MDM9215, MDM9225, MDM9225M, MDM9230, MDM9235M, MDM9250, MDM9310, MDM9330, MDM9607, MDM9609, MDM9615, MDM9625, MDM9625M, MDM9626, MDM9628, MDM9630, MDM9635M, MDM9640, MDM9645, MDM9650, MDM9655, MSM8108, MSM8208, MSM8209, MSM8608, MSM8909W, MSM8916, MSM8917, MSM8920, MSM8929, MSM8937, MSM8939, MSM8940, MSM8952, MSM8953, MSM8956, MSM8976, MSM8976SG, MSM8992, MSM8994, MSM8996AU, PM215, PM3003A, PM4125, PM439, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM640A, PM640L, PM640P, PM660, PM660A, PM660L, PM670, PM670A, ...[truncated*]

Published CVSS scores

8.8NIST National Vulnerability DatabaseCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.3NIST National Vulnerability DatabaseAV:A/AC:L/Au:N/C:C/I:C/A:C

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1499.004Application or System Exploitation

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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