CVE-2021-35132

Memory corruption via unchecked DSP response size

Published Sep 2, 2022 · Updated Aug 4, 2024

Out-of-bounds write in the Qualcomm Snapdragon DSP service allows local users to corrupt memory via an oversized response buffer size. The DSP service fails to validate the response buffer size before writing through a derived pointer, allowing the write to exceed the buffer boundary. Local access is required, but no privileges or user interaction are required; the published record does not identify the triggering interface.

CVSS severity8.4
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Qualcomm Snapdragon DSP service allows local users to corrupt memory via an oversized response buffer size. The DSP service fails to validate the response buffer size before writing through a derived pointer, allowing the write to exceed the buffer boundary. Local access is required, but no privileges or user interaction are required; the published record does not identify the triggering interface.

The record

CVE
CVE-2021-35132
Published
Sep 2, 2022
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-1284
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, QCA6574, QCA6574A, QCA6574AU, QCA6595AU, QCA6696, QCA8081, QCA8337, QCM2290, QCM4290, QCM6490, QCS2290, QCS410, QCS4290, QCS610, QCS6490, QRB5165, QRB5165M, QRB5165N, QSM8350, SA515M, SA6155, SA6155P, SA8155, SA8155P, SA8195P, SA8540P, SA9000P, SD 675, SD 8cx Gen2, SD 8cx Gen3, SD429, SD460, SD480, SD662, SD665, SD670, SD675, SD678, SD680, SD690 5G, SD695, SD710, 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, WCD9326, 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, QCA6574, QCA6574A, QCA6574AU, QCA6595AU, QCA6696, QCA8081, QCA8337, QCM2290, QCM4290, QCM6490, QCS2290, QCS410, QCS4290, QCS610, QCS6490, QRB5165, QRB5165M, QRB5165N, QSM8350, SA515M, SA6155, SA6155P, SA8155, SA8155P, SA8195P, SA8540P, SA9000P, SD 675, SD 8cx Gen2, SD 8cx Gen3, SD429, SD460, SD480, SD662, SD665, SD670, SD675, SD678, SD680, SD690 5G, SD695, SD710, 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, WCD9326, 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

8.4Qualcomm, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS: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-1284Improper Validation of Specified Quantity in Input

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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