CVE-2021-0961

Local kernel memory disclosure via uninitialized quota data

Published Dec 15, 2021 · Updated Aug 3, 2024

Information disclosure in Android kernel allows local users to read kernel memory via quota_proc_write in xt_quota2.c. The function handles quota data containing uninitialized bytes and can return those bytes to a caller. System execution privileges are required, no user interaction is needed, and the documented consequence is local confidentiality loss without reported integrity or availability impact.

CVSS severity4.4
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Android kernel allows local users to read kernel memory via quota_proc_write in xt_quota2.c. The function handles quota data containing uninitialized bytes and can return those bytes to a caller. System execution privileges are required, no user interaction is needed, and the documented consequence is local confidentiality loss without reported integrity or availability impact.

The record

CVE
CVE-2021-0961
Published
Dec 15, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-909, T1005
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 15, 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?

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  1. Affected versionversion=Android kernel

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Google Cloud · Androidversion=Android kernel

Published CVSS scores

4.4NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

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.

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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-909Missing Initialization of Resource
T1005Data from Local System

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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