CVE-2022-40535Network attack vector

Remote service interruption via WLAN buffer over-read

Published Mar 7, 2023 · Updated Aug 3, 2024

Buffer over-read in Qualcomm Snapdragon WLAN firmware allows remote attackers to cause a transient service interruption by sending a packet. The closed-source WLAN transmit path reads beyond a packet buffer while sending the packet to the device; Qualcomm has not disclosed the faulty routine or missing bounds operation. No privileges or user interaction are required, and the documented consequence is limited to transient denial of service.

CVSS severity7.5
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Buffer over-read in Qualcomm Snapdragon WLAN firmware allows remote attackers to cause a transient service interruption by sending a packet. The closed-source WLAN transmit path reads beyond a packet buffer while sending the packet to the device; Qualcomm has not disclosed the faulty routine or missing bounds operation. No privileges or user interaction are required, and the documented consequence is limited to transient denial of service.

The record

CVE
CVE-2022-40535
Published
Mar 7, 2023
Updated
Aug 3, 2024
Vendor
Qualcomm
Product
Qualcomm SDX55M Firmware
Classifications
CWE-126, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 7, 2023CVE 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=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Qualcomm SDX55M Firmwareversion=*
Qualcomm · QCN9074 Firmwareversion=*
Qualcomm · Qualcomm SDX65M Firmwareversion=*
Qualcomm · WCD9326 Firmwareversion=*
Qualcomm · SW5100 Firmwareversion=*
Qualcomm · SW5100P Firmwareversion=*
Qualcomm · QCA8386 Firmwareversion=*
Qualcomm · Qualcomm QCA6431 Firmwareversion=*
Qualcomm · IPQ8078 Firmwareversion=*
Qualcomm · Qualcomm WCD9375 Firmwareversion=*
Qualcomm · Qualcomm SM4125 Firmwareversion=*
Qualcomm · CSR8811 Firmwareversion=*
Qualcomm · Qualcomm Snapdragon 4 Gen 1 Firmwareversion=*
Qualcomm · QCA8084 Firmwareversion=*
Qualcomm · WSA8810 Firmwareversion=*
Qualcomm · Qualcomm QCA6426 Firmwareversion=*
Qualcomm · QCA8081 Firmwareversion=*
Qualcomm · IPQ8070A Firmwareversion=*
Qualcomm · IPQ8078A Firmwareversion=*
Qualcomm · IPQ8174 Firmwareversion=*
Qualcomm · QCN9274 Firmwareversion=*
Qualcomm · Snapdragonversion=CSR8811; version=IPQ8070A; version=IPQ8071A; version=IPQ8072A; version=IPQ8074A; version=IPQ8076; version=IPQ8076A; version=IPQ8078; version=IPQ8078A; version=IPQ8173; version=IPQ8174; version=IPQ9008; version=IPQ9574; version=QCA4024; version=QCA6390; version=QCA6391; version=QCA6421; version=QCA6426; version=QCA6431; version=QCA6436; version=QCA8081; version=QCA8082; version=QCA8084; version=QCA8085; version=QCA8386; version=QCA9888; version=QCA9889; version=QCN5024; version=QCN5124; version=QCN5154; version=QCN5164; version=QCN6023; version=QCN6024; version=QCN9000; version=QCN9024; version=QCN9070; version=QCN9072; version=QCN9074; version=QCN9274; version=SD460; version=SD480; version=SD662; version=SD680; version=SD695; version=SD865 5G; version=SD870; version=SDX55M; version=SDX65; version=SDX65M; version=SM4125; version=Snapdragon 4 Gen 1; version=SW5100; version=SW5100P; version=WCD9326; version=WCD9335; version=WCD9370; version=WCD9375; version=WCD9380; version=WCD9385; version=WCN3910; version=WCN3950; version=WCN3980; version=WCN3988; version=WCN3991; version=WCN3998; version=WCN6850; version=WCN6851; version=WSA8810; version=WSA8815; version=WSA8830; version=WSA8835
Qualcomm · IPQ8071A Firmwareversion=*
Qualcomm · QCA6421 Firmwareversion=*
Qualcomm · WCD9370 Firmwareversion=*
Qualcomm · IPQ8076 Firmwareversion=*
Qualcomm · QCA9888 Firmwareversion=*
Qualcomm · Qualcomm SDX65 Firmwareversion=*
Qualcomm · IPQ8076A Firmwareversion=*
Qualcomm · WCN3988 Firmwareversion=*
Qualcomm · Qualcomm SD695 Firmwareversion=*
Qualcomm · Qualcomm QCA6436 Firmwareversion=*
Qualcomm · Qualcomm QCA6390 Firmwareversion=*
Qualcomm · Qualcomm SD662 Firmwareversion=*
Qualcomm · Qualcomm SD680 Firmwareversion=*
Qualcomm · WCD9380 Firmwareversion=*
Qualcomm · QCA8085 Firmwareversion=*
Qualcomm · Qualcomm WCN3991 Firmwareversion=*
Qualcomm · QCN5024 Firmwareversion=*
Qualcomm · IPQ8173 Firmwareversion=*
Qualcomm · SD460 Firmwareversion=*
Qualcomm · QCN6024 Firmwareversion=*
Qualcomm · QCN5164 Firmwareversion=*
Qualcomm · IPQ9574 Firmwareversion=*
Qualcomm · QCN9070 Firmwareversion=*
Qualcomm · Qualcomm SD870 Firmwareversion=*
Qualcomm · Qualcomm SD865 5G Firmwareversion=*
Qualcomm · IPQ8074A Firmwareversion=*
Qualcomm · QCA4024 Firmwareversion=*
Qualcomm · QCN9024 Firmwareversion=*
Qualcomm · QCN9000 Firmwareversion=*
Qualcomm · QCN6023 Firmwareversion=*
Qualcomm · Qualcomm WCN6851 Firmwareversion=*
Qualcomm · WCN3950 Firmwareversion=*
Qualcomm · WSA8830 Firmwareversion=*
Qualcomm · QCA6391 Firmwareversion=*
Qualcomm · WCD9385 Firmwareversion=*
Qualcomm · WCN3980 Firmwareversion=*
Qualcomm · Qualcomm WCN6850 Firmwareversion=*
Qualcomm · QCA8082 Firmwareversion=*
Qualcomm · WSA8835 Firmwareversion=*
Qualcomm · IPQ9008 Firmwareversion=*
Qualcomm · Qualcomm WCN3998 Firmwareversion=*
Qualcomm · QCN5154 Firmwareversion=*
Qualcomm · SD480 Firmwareversion=*
Qualcomm · Qualcomm WCD9335 Firmwareversion=*
Qualcomm · IPQ8072A Firmwareversion=*
Qualcomm · Qualcomm WCN3910 Firmwareversion=*
Qualcomm · WSA8815 Firmwareversion=*
Qualcomm · QCN5124 Firmwareversion=*
Qualcomm · QCN9072 Firmwareversion=*
Qualcomm · QCA9889 Firmwareversion=*

Published CVSS scores

7.5Qualcomm, Inc.CVSS: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-126Buffer Over-read
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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