CVE-2021-39800

Name: CVE-2021-39800
Creator: NVD / NIST
Published: 2022-04-12T17:15:08.33+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.14%

Last modified Jun 17, 2026

CVE-2021-39800 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In ion_ioctl of ion-ioctl.c, there is a possible way to leak kernel head data due to a use after free. This could lead to local information disclosure with no additional execution privileges needed. EPSS estimates a 0.14% chance of exploitation in the next 30 days.

Description

In ion_ioctl of ion-ioctl.c, there is a possible way to leak kernel head data due to a use after free. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-208277166References: Upstream kernel

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.14%

3.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Google	Android	All versions

References

https://source.android.com/security/bulletin/2022-04-01Patch, Vendor Advisory
https://source.android.com/security/bulletin/2022-04-01Patch, Vendor Advisory

Timeline

Published: Apr 12, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39800?

How severe is CVE-2021-39800?

CVE-2021-39800 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39800?

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-2021-39800?

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

Scan your code now

Source: NVD / NIST