CVE-2021-39793: Google Pixel Out-of-Bounds Write Vulnerability

CVE-2021-39793 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2022-04-11

An out-of-bounds write vulnerability exists in the kbase_jd_user_buf_pin_pages function of mali_kbase_mem.c in the Android kernel. A logic error allows for local escalation of privilege without requiring additional execution privileges or user interaction.

Technologies: Android Pixel. Vendors: Android.

Quick answers

Is CVE-2021-39793 exploited in the wild?
Yes. CVE-2021-39793 is known to be exploited in the wild, first recorded on 11 April 2022. Treat it as urgent.
How severe is CVE-2021-39793?
Critical severity, with a CVSS score of 7.8, published 11 April 2022.
Which products and versions are affected?
Google Android Kernel Android Kernel.
Is there a fix for CVE-2021-39793?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-39793 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2021-39793?
Check whether you run Android Pixel. 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 Android Kernel

Timeline

  • 2022-03-16: disclosed: NVD Published Date
  • 2022-04-11: kev added: Date added to CISA Known Exploited Vulnerabilities Catalog
  • 2022-03-01: advisory: Vendor advisory published by Android/Google
  • 2022-04-11: exploited: Reported as exploited in the wild per CISA KEV and advisory metadata.

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