CVE-2021-30291

Memory corruption via unchecked VR allocation size

Published Oct 20, 2021 · Updated Aug 3, 2024

Incorrect buffer-size calculation in Qualcomm Snapdragon VR Service allows local users to corrupt memory through crafted client data. The VR Service passes unvalidated client-supplied values into its memory-allocation size calculation, producing an incorrect buffer size. Local access to a device containing an affected chipset is required, and successful exploitation compromises confidentiality, integrity, and availability.

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

What happened

Incorrect buffer-size calculation in Qualcomm Snapdragon VR Service allows local users to corrupt memory through crafted client data. The VR Service passes unvalidated client-supplied values into its memory-allocation size calculation, producing an incorrect buffer size. Local access to a device containing an affected chipset is required, and successful exploitation compromises confidentiality, integrity, and availability.

The record

CVE
CVE-2021-30291
Published
Oct 20, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, CWE-131
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 20, 2021CVE 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

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.4Qualcomm Technologies, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2NIST National Vulnerability DatabaseAV: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-131Incorrect Calculation of Buffer Size

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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