Home/CVE/Android Kernel Use-After-Free Vulnerability
CVE

CVE-2021-1048

Android 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.

HIGH · CVSS 7.8 ⚠ CISA KEV EPSS 0.00912
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
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Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

CWE-416Use After Free
CWE-416Use After Free
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Affected Products & Versions

1
google androidall versions
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Scoring & Timeline

7.8
HIGH · CVSS v3.1 · security@android.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Dec 2021 · 07:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

2
cisaKEV-CVE-2021-1048
android-securityANDROID-2021-11-01High
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://source.android.com/security/bulletin/2021-11-01PatchVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1048Third Party AdvisoryUS Government Resource
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