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

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. 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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