CVE-2021-30283

Kernel denial of service via debug-register trap

Published Jan 3, 2022 · Updated Aug 3, 2024

Kernel error handling in Qualcomm Snapdragon allows local users to interrupt service by triggering a debug-register trap. The kernel detects a debug-register trap raised by a user application but fails to take the required action for that exceptional condition. A locally running user application is the reachability gate, and the documented consequence is limited to loss of availability.

CVSS severity7.1
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Kernel error handling in Qualcomm Snapdragon allows local users to interrupt service by triggering a debug-register trap. The kernel detects a debug-register trap raised by a user application but fails to take the required action for that exceptional condition. A locally running user application is the reachability gate, and the documented consequence is limited to loss of availability.

The record

CVE
CVE-2021-30283
Published
Jan 3, 2022
Updated
Aug 3, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-755, T1499
Attack vector
local
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

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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=QCA6391, QCM6490, QCS6490, QRB5165, QRB5165N, SD778G, SD888 5G, SM7325P, WCD9370, WCD9375, WCD9380, WCD9385, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8830, WSA8835

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=QCA6391, QCM6490, QCS6490, QRB5165, QRB5165N, SD778G, SD888 5G, SM7325P, WCD9370, WCD9375, WCD9380, WCD9385, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8830, WSA8835

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1Qualcomm, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
2.1NVDAV:L/AC:L/Au:N/C:N/I:N/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions
T1499Endpoint 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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