CVE-2021-35098

Memory corruption via unvalidated PCM session ID

Published Jun 14, 2022 · Updated Aug 4, 2024

Memory corruption in Snapdragon PCM routing on listed chipsets allows local users with high privileges to corrupt process memory via a session ID. The proprietary PCM routing process fails to validate a supplied session identifier before using it in an audio pointer-offset operation. Exploitation requires high local privileges and can affect confidentiality, integrity, and availability, but Qualcomm has not disclosed whether code execution is possible.

CVSS severity6.7
Medium
EPSS probability0.15%
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

Memory corruption in Snapdragon PCM routing on listed chipsets allows local users with high privileges to corrupt process memory via a session ID. The proprietary PCM routing process fails to validate a supplied session identifier before using it in an audio pointer-offset operation. Exploitation requires high local privileges and can affect confidentiality, integrity, and availability, but Qualcomm has not disclosed whether code execution is possible.

The record

CVE
CVE-2021-35098
Published
Jun 14, 2022
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-119
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 14, 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=APQ8053, APQ8096AU, AQT1000, AR8031, CSRA6620, CSRA6640, MDM9150, MDM9640, MDM9650, MSM8953, QCA6174A, QCA6390, QCA6391, QCA6420, QCA6426, QCA6430, QCA6436, QCA6574A, QCA6574AU, QCA9377, QCM4290, QCM6125, QCS405, QCS410, QCS4290, QCS603, QCS605, QCS610, QCS6125, QRB5165, QRB5165M, QRB5165N, Qualcomm215, SA515M, SD429, SD460, SD480, SD662, SD680, SD690 5G, SD695, SD750G, SD765, SD765G, SD768G, SD778G, SD780G, SD855, SD865 5G, SD870, SD888 5G, SDM429W, SDX12, SDX55, SDX55M, SDXR2 5G, SM7250P, SM7325P, WCD9326, WCD9335, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3615, WCN3620, WCN3660B, WCN3680, WCN3680B, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN6740, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Qualcomm · Snapdragonversion=APQ8053, APQ8096AU, AQT1000, AR8031, CSRA6620, CSRA6640, MDM9150, MDM9640, MDM9650, MSM8953, QCA6174A, QCA6390, QCA6391, QCA6420, QCA6426, QCA6430, QCA6436, QCA6574A, QCA6574AU, QCA9377, QCM4290, QCM6125, QCS405, QCS410, QCS4290, QCS603, QCS605, QCS610, QCS6125, QRB5165, QRB5165M, QRB5165N, Qualcomm215, SA515M, SD429, SD460, SD480, SD662, SD680, SD690 5G, SD695, SD750G, SD765, SD765G, SD768G, SD778G, SD780G, SD855, SD865 5G, SD870, SD888 5G, SDM429W, SDX12, SDX55, SDX55M, SDXR2 5G, SM7250P, SM7325P, WCD9326, WCD9335, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3615, WCN3620, WCN3660B, WCN3680, WCN3680B, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN6740, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

Published CVSS scores

6.7QualcommCVSS: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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

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