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

Source: https://junglewise.ai/threats/cve-2021-39793-google-pixel-out-of-bounds-write-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-04-11. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/pixel). Vendors: [Android](https://junglewise.ai/threats/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.

## Related threats

- [Android Pixel Privilege Escalation Vulnerability](https://junglewise.ai/threats/cve-2024-32896-android-pixel-privilege-escalation-vulnerability)
- [Android Pixel Privilege Escalation Vulnerability](https://junglewise.ai/threats/cve-2024-29748-android-pixel-privilege-escalation-vulnerability)
- [Android Pixel Information Disclosure Vulnerability](https://junglewise.ai/threats/cve-2024-29745-android-pixel-information-disclosure-vulnerability)
- [Android Pixel Information Disclosure Vulnerability](https://junglewise.ai/threats/cve-2023-21237-android-pixel-information-disclosure-vulnerability)