Is CVE-2021-0920 actively exploited?

CVE-2021-0920 has no public evidence of in-the-wild exploitation as of 2025-10-23.

What is the CVSS score for CVE-2021-0920?

CVE-2021-0920 has a CVSS score of 6.4 (MEDIUM severity). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2021-0920?

Patch guidance is available from linux security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-0920.

CVE-2021-0920 - remediation guidance & executive summary

Q: Which products are affected by CVE-2021-0920?

6 products: linux linux kernel, linux linux kernel, linux linux kernel, linux linux kernel, google android, and 1 more.

Description

In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector: local
Complexity: high
Privileges: high
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-362 · Race Condition CWE-416 · Use After Free CWE-416 · Use After Free

Metadata

Primary Vendor: LINUX
Published: 12/15/2021
Last Modified: 10/23/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

linux : linux_kernellinux : linux_kernellinux : linux_kernellinux : linux_kernelgoogle : androiddebian : debian_linux

Remediation Guidance

Executive Summary

View on NIST NVD