CVE-2021-0879

Local privilege escalation via transfer size overflow

Published Apr 19, 2023 · Updated Feb 6, 2025

Integer overflow in the PowerVR kernel driver in Google Cloud Android SoC allows local users to gain elevated privileges via a crafted transfer. PVRSRVBridgeRGXTDMSubmitTransfer omits a size check, so attacker-controlled size arithmetic can wrap and drive out-of-bounds heap access. A low-privileged local user can exploit the driver without user interaction; the resulting heap access can cross kernel privilege boundaries.

CVSS severity7.8
High
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in the PowerVR kernel driver in Google Cloud Android SoC allows local users to gain elevated privileges via a crafted transfer. PVRSRVBridgeRGXTDMSubmitTransfer omits a size check, so attacker-controlled size arithmetic can wrap and drive out-of-bounds heap access. A low-privileged local user can exploit the driver without user interaction; the resulting heap access can cross kernel privilege boundaries.

The record

CVE
CVE-2021-0879
Published
Apr 19, 2023
Updated
Feb 6, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-190, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Android SoC

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google Cloud · Androidversion=Android SoC

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
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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