CVE-2021-39793

Name: CVE-2021-39793
Creator: NVD / NIST
Published: 2022-03-16T15:15:12.43+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 0.73%

Last modified Jun 17, 2026

CVE-2021-39793 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In kbase_jd_user_buf_pin_pages of mali_kbase_mem.c, there is a possible out of bounds write due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. CISA has confirmed active exploitation in the wild. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

In kbase_jd_user_buf_pin_pages of mali_kbase_mem.c, there is a possible out of bounds write due to a logic error in the code. 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-210470189References: N/A

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.73%

49.4th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 2, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Google	Android	All versions

References

https://source.android.com/security/bulletin/pixel/2022-03-01Vendor Advisory
https://source.android.com/security/bulletin/pixel/2022-03-01Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39793Third Party Advisory, US Government Resource

Timeline

Published: Mar 16, 2022
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-39793?

How severe is CVE-2021-39793?

CVE-2021-39793 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2021-39793?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-39793?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST