CVE-2021-0920

Status: AnalyzedMedium (6.4)⚠ Active exploitation

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

Version: 3.1
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Base score: 6.4

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.82%
Percentile among all scored CVEs: 56
Score date: 10/6/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

CISA KEV — actively exploited

Added to catalog: 5/23/2022
Remediation due date: 6/13/2022
Known ransomware use: Unknown

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1068 Exploitation for Privilege Escalationprivilege escalation95 %

Vulnerabilidad de race condition (CWE-362) en el kernel de Unix que permite escalada de privilegios local. El vector AV:L y PR:H indica explotación local con privilegios elevados (T1068). El impacto lleva a ejecución de código con privilegios del sistema (T1059).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Threat Intelligence Program Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software

Affected technologies (3)

Debian — Debian Linux Google — Android Linux — Linux Kernel

CWEs

CWE-362, CWE-416
CWE-416

References

Raw JSON (NVD)

Show

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