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

Source: https://junglewise.ai/threats/cve-2021-1048-android-kernel-use-after-free-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-23. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2021-1048 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2022-05-23

A use-after-free vulnerability in the ep_loop_check_proc function of eventpoll.c in the Android kernel allows for local escalation of privilege. Exploitation does not require user interaction or additional execution privileges.

Technologies: [Linux Kernel](https://junglewise.ai/threats/technologies/kernel). Vendors: [Linux](https://junglewise.ai/threats/vendors/linux).

## Quick answers

**Is CVE-2021-1048 exploited in the wild?** Yes. CVE-2021-1048 is known to be exploited in the wild, first recorded on 23 May 2022. Treat it as urgent.

**How severe is CVE-2021-1048?** Critical severity, with a CVSS score of 7.8, published 23 May 2022.

**Which products and versions are affected?** Google Android Kernel.

**Is there a fix for CVE-2021-1048?** A patch was published on 2021-11-01: Android Security Bulletin – November 2021 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2021-1048 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2021-1048?** Check whether you run Linux Kernel. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Google Android Kernel

## Timeline

- 2021-11-01: patched: Android Security Bulletin – November 2021
- 2021-12-15: disclosed: NVD Published Date
- 2022-05-23: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-05-23: exploited: Reported as exploited in the wild in CISA KEV and advisory.

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