CVE-2021-0920VulnerabilityPublished 05/23/2022Updated 10/24/2026

CVE-2021-0920: Android Kernel Race Condition Vulnerability

Affects Android KernelSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 05/23/2022
KEV deadline: 06/13/2022
EPSS: 0.9% chance of exploitation in 30 days – higher than 58% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2021-0920 (opens in a new tab)

Description

CVE-2021-0920 is a race condition vulnerability in the Android kernel that results in a use-after-free condition. This flaw can be exploited to escalate privileges on affected devices. The vulnerability has been observed in the wild, indicating active exploitation. No specific affected versions or patch information is provided in the available data.

Summary

The Android kernel contains a race condition vulnerability identified as CVE-2021-0920, which leads to a use-after-free condition. This flaw allows attackers to potentially escalate privileges on the device by exploiting the timing issue inherent in the kernel's handling of certain operations. The vulnerability is classified under CWE-362 (Race Condition) and CWE-416 (Use After Free). It has been reported as exploited in the wild, underscoring its practical risk. However, no explicit patch or remediation details are included in the provided information.

Impact

Successful exploitation of this vulnerability can allow an attacker to escalate privileges on an affected Android device, potentially gaining higher-level access than intended. This can lead to unauthorized actions or control over the device. The presence of known exploitation in the wild confirms the active threat posed by this vulnerability.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should apply any security updates provided by their device manufacturer or Android security bulletins. Monitoring vendor communications for patches addressing this vulnerability is recommended.

CVE-2021-0920: Android Kernel Race Condition Vulnerability

What to do

Description

Summary

Impact

Mitigation

Weaknesses

References

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 11:41:22 UTC

Weaknesses

References

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