CVE-2021-1048Android Kernel Use-After-Free Vulnerability

In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-204573007References: Upstream kernel

7.8 HIGHEPSS 1.05%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 03:30 UTC

OverviewCVSS details

7.8HIGHCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: Dec 15, 2021
Assigner: google_android

Affected

Android

Versions: Android kernel

Exploitation

Public exploit: None listed
CISA KEV: Listed · May 23, 2022
KEV due date: Jun 13, 2022
Ransomware use: Unknown
SSVC: Exploitation active · Automatable no · Impact total

EPSS · FIRST, scored Nov 9

1.05%chance of exploitation in 30 days

Higher than 64.71% of CVEs

CVSS 3.1 · NVD

7.8High

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

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

CVSS 2.0 · NVD

7.2High

AV:L/AC:L/Au:N/C:C/I:C/A:C

Attack vector: Local
Attack complexity: Low
Authentication: None
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
7.8	HIGH	3.1NVD	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2	HIGH	2.0NVD	AV:L/AC:L/Au:N/C:C/I:C/A:C

CISA required action

⚡ Known exploited · remediation due Jun 13, 2022

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Details

CVE ID: CVE-2021-1048
Status: Analyzed
Assigner (CNA): google_android
Published: Dec 15, 2021
Last modified: 2026-06-17 03:30 UTC
Weaknesses: CWE-416

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-09 15:15 UTC.