CVE-2021-30279

Access-control bypass via improper VMID permission masking

Published Jan 3, 2022 · Updated Aug 3, 2024

Improper access control in Qualcomm Snapdragon chipsets allows local users with low privileges to alter VMID permissions. Core firmware applies an improper permission mask when setting current permissions for virtual machine identifiers, granting access beyond the intended boundary. Exploitation requires local low-privileged access and permits compromise of confidentiality, integrity, and availability across protected execution contexts.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Qualcomm Snapdragon chipsets allows local users with low privileges to alter VMID permissions. Core firmware applies an improper permission mask when setting current permissions for virtual machine identifiers, granting access beyond the intended boundary. Exploitation requires local low-privileged access and permits compromise of confidentiality, integrity, and availability across protected execution contexts.

The record

CVE
CVE-2021-30279
Published
Jan 3, 2022
Updated
Aug 3, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-281, T1068
Attack vector
local
Privileges
authenticated

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

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=AR8035, QCA6390, QCA6391, QCA6426, QCA6436, QCA8337, QCA9984, QCM2290, QCM4290, QCM6490, QCS2290, QCS405, QCS4290, QCS6490, QCX315, QRB5165, QRB5165N, QSM8250, SD460, SD480, SD660, SD662, SD690 5G, SD750G, SD765, SD765G, SD768G, SD778G, SD865 5G, SD870, SD888 5G, SDX55, SDX55M, SDX57M, SDXR2 5G, SM6225, SM6375, SM7250P, SM7325P, WCD9335, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN3999, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Qualcomm · Snapdragonversion=AR8035, QCA6390, QCA6391, QCA6426, QCA6436, QCA8337, QCA9984, QCM2290, QCM4290, QCM6490, QCS2290, QCS405, QCS4290, QCS6490, QCX315, QRB5165, QRB5165N, QSM8250, SD460, SD480, SD660, SD662, SD690 5G, SD750G, SD765, SD765G, SD768G, SD778G, SD865 5G, SD870, SD888 5G, SDX55, SDX55M, SDX57M, SDXR2 5G, SM6225, SM6375, SM7250P, SM7325P, WCD9335, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN3999, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

Published CVSS scores

7.8Qualcomm, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-281Improper Preservation of Permissions
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

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Your stack

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