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CVE-2021-25395: Samsung Mobile Devices Race Condition Vulnerability

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2023-06-29
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-11 · updated 2026-06-17
• Weakness: CWE-362

Description

A race condition in MFC charger driver prior to SMR MAY-2021 Release 1 allows local attackers to bypass signature check given a radio privilege is compromised.

Affected products

• Samsung Android: 8.1, 9.0-smr-apr-2021-r1, 9.0-smr-feb-2021-r1, 9.0-smr-jan-2021-r1, 9.0-smr-mar-2021-r1, 10.0-smr-apr-2021-r1 (+6)

References

• https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=5
• https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=5
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25395

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