Is CVE-2021-0920 in the CISA KEV catalog?

Yes. CVE-2021-0920 is on the CISA Known Exploited Vulnerabilities list, added 2022-05-23.

What is the CVSS severity of CVE-2021-0920?

CVE-2021-0920 has a CVSS v3 base score of 6.4 (MEDIUM).

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

CVE-2021-0920 has an EPSS score of 0.81% (52th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2021-0920

MEDIUMCISA KEV

6.4

CVSS v3

NVD

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

CWE-362Race Condition CWE-416Use After Free

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.81%probability of exploitation in 30 days

52ndpercentile

Moderate risk: more likely to be exploited than 52% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Android Kernel Race Condition Vulnerability

Android kernel contains a race condition, which allows for a use-after-free vulnerability. Exploitation can allow for privilege escalation.

Apply updates per vendor instructions.

Remediation due: 2022-06-13

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-23.