CVE-2021-35122

Cross-boundary resource access via unvalidated xPU permissions

Published Sep 2, 2022 · Updated Aug 4, 2024

Improper input validation in Qualcomm Snapdragon Core allows local users to alter IO-space xPU resource-group permissions. The Core accepts unvalidated requests from the non-secure region and applies them to permissions protecting xPU-controlled IO space. Exploitation crosses the secure-world boundary and enables access to, modification of, or interruption of protected resources without physical access or user interaction.

CVSS severity9.3
Critical
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper input validation in Qualcomm Snapdragon Core allows local users to alter IO-space xPU resource-group permissions. The Core accepts unvalidated requests from the non-secure region and applies them to permissions protecting xPU-controlled IO space. Exploitation crosses the secure-world boundary and enables access to, modification of, or interruption of protected resources without physical access or user interaction.

The record

CVE
CVE-2021-35122
Published
Sep 2, 2022
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-20, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 2, 2022CVE 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=AQT1000, AR8035, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431, QCA6436, QCA6574A, QCA6574AU, QCA6595AU, QCA6696, QCA8081, QCA8337, QCM2290, QCM4290, QCM6490, QCS2290, QCS410, QCS4290, QCS610, QCS6490, QRB5165, QRB5165M, QRB5165N, QSM8350, SA515M, SA8540P, SA9000P, SD 675, SD 8CX, SD 8cx Gen2, SD 8cx Gen3, SD429, SD460, SD480, SD662, SD675, SD678, SD680, SD690 5G, SD695, SD720G, SD730, SD750G, SD765, SD765G, SD768G, SD778G, SD780G, SD7c, SD855, SD865 5G, SD870, SD888, SD888 5G, SDM429W, SDX50M, SDX55, SDX55M, SDX65, SDXR2 5G, SM4125, SM6250, SM6250P, SM7250P, SM7315, SM7325P, SW5100, SW5100P, WCD9340, WCD9341, WCD9360, WCD9370, WCD9371, WCD9375, WCD9380, WCD9385, WCN3620, WCN3660B, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN6740, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WCN7850, WCN7851, WSA8810, WSA8815, WSA8830, WSA8835

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=AQT1000, AR8035, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431, QCA6436, QCA6574A, QCA6574AU, QCA6595AU, QCA6696, QCA8081, QCA8337, QCM2290, QCM4290, QCM6490, QCS2290, QCS410, QCS4290, QCS610, QCS6490, QRB5165, QRB5165M, QRB5165N, QSM8350, SA515M, SA8540P, SA9000P, SD 675, SD 8CX, SD 8cx Gen2, SD 8cx Gen3, SD429, SD460, SD480, SD662, SD675, SD678, SD680, SD690 5G, SD695, SD720G, SD730, SD750G, SD765, SD765G, SD768G, SD778G, SD780G, SD7c, SD855, SD865 5G, SD870, SD888, SD888 5G, SDM429W, SDX50M, SDX55, SDX55M, SDX65, SDXR2 5G, SM4125, SM6250, SM6250P, SM7250P, SM7315, SM7325P, SW5100, SW5100P, WCD9340, WCD9341, WCD9360, WCD9370, WCD9371, WCD9375, WCD9380, WCD9385, WCN3620, WCN3660B, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN6740, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WCN7850, WCN7851, WSA8810, WSA8815, WSA8830, WSA8835

Published CVSS scores

9.3QualcommCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/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.

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1068Exploitation for Privilege Escalation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo