Vulnerability

CVE-2021-0920

Medium· 6.4KEVCVSS6.4EPSS1%

.rules3/5

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.

Threat signal

74/100

High

Severity

medium

CVSS

6.4

EPSS

Active

KEV

CISA KEV — actively exploited

1461d overdue

AffectedAndroid — Kernel

Added to KEV

2022-05-23

Federal patch due (BOD 22-01)

2022-06-13

Required action (CISA verbatim)

Apply updates per vendor instructions.

Vendor advisory + references

https://nvd.nist.gov/vuln/detail/CVE-2021-0920

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

CVSS

v3.1Open in FIRST calculator →

6.4/ 10MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack VectorLocalRequires local access — shell, console, or local app.
Attack ComplexityHighRequires conditions outside attacker's control (race, brute-force, configuration
Privileges RequiredHighAdmin / root privileges required.
User InteractionNoneFully automated — no victim action needed.
ScopeUnchangedImpact contained to the vulnerable component.
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactHighTotal compromise of integrity — full data modification possible.
Availability ImpactHighTotal loss of availability — full DoS possible.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

0.91%

probability of exploitation in next 30 days

p76

higher than 76% of all CVEs

3-day trend↑ 0pp

Low exploitation likelihood — defer if no other signals fire.

Vendor VEX

No VEX statements published for CVE-2021-0920. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCAttend

Active exploitation with limited impact — coordinate patching

exploitation: active
automatable: no
impact: partial
mission: support

Lifecycle

2022-05-23Added to CISA KEVransomware: Unknown
2022-05-23Published
2022-06-13Federal patch due (BOD 22-01)
2026-06-12Last modified1 source

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.