CVE-2021-1962

Local compromise via unchecked IOCTL size

Published Sep 9, 2021 · Updated Aug 3, 2024

Buffer overflow in Qualcomm Snapdragon allows local users with high privileges to compromise confidentiality, integrity, and availability via an IOCTL. The peripheral-endpoint information handler fails to validate the maximum endpoint-pair count and size before copying or processing input, enabling memory corruption. Exploitation requires privileged local access to the Snapdragon device; the record does not establish remote reachability or a specific exploitation path.

CVSS severity6.7
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Qualcomm Snapdragon allows local users with high privileges to compromise confidentiality, integrity, and availability via an IOCTL. The peripheral-endpoint information handler fails to validate the maximum endpoint-pair count and size before copying or processing input, enabling memory corruption. Exploitation requires privileged local access to the Snapdragon device; the record does not establish remote reachability or a specific exploitation path.

The record

CVE
CVE-2021-1962
Published
Sep 9, 2021
Updated
Aug 3, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-120
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 9, 2021CVE 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

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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=AQT1000, AR9380, FSM10055, FSM10056, IPQ8064, IPQ8065, IPQ8068, IPQ8069, MDM9150, QCA6391, QCA6420, QCA6430, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA9531, QCA9558, QCA9561, QCA9563, QCA9880, QCA9882, QCA9886, QCA9887, QCA9888, QCA9889, QCA9896, QCA9898, QCA9980, QCA9982, QCA9984, QCA9990, QCA9992, QCA9994, QCS410, QCS605, QCS610, Qualcomm215, SA6145P, SA6150P, SA6155, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD205, SD210, SD665, SD675, SD678, SD720G, SD730, SD855, SDA429W, SDX50M, SDX55, SDX55M, SM6250, WCD9326, WCD9335, WCD9340, WCD9341, WCD9370, WCD9375, WCD9380, WCN3610, WCN3615, WCN3620, WCN3660B, WCN3680, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WSA8810, WSA8815

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Qualcomm · Snapdragonversion=AQT1000, AR9380, FSM10055, FSM10056, IPQ8064, IPQ8065, IPQ8068, IPQ8069, MDM9150, QCA6391, QCA6420, QCA6430, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA9531, QCA9558, QCA9561, QCA9563, QCA9880, QCA9882, QCA9886, QCA9887, QCA9888, QCA9889, QCA9896, QCA9898, QCA9980, QCA9982, QCA9984, QCA9990, QCA9992, QCA9994, QCS410, QCS605, QCS610, Qualcomm215, SA6145P, SA6150P, SA6155, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD205, SD210, SD665, SD675, SD678, SD720G, SD730, SD855, SDA429W, SDX50M, SDX55, SDX55M, SM6250, WCD9326, WCD9335, WCD9340, WCD9341, WCD9370, WCD9375, WCD9380, WCN3610, WCN3615, WCN3620, WCN3660B, WCN3680, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WSA8810, WSA8815

Published CVSS scores

4.6NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
6.7Qualcomm, Inc.CVSS:3.1/AV:L/AC:L/PR:H/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
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.

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Technologies

Your stack

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Your stack

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