CVE-2021-25394
Samsung Mobile Devices Race Condition Vulnerability
Samsung Mobile Devices
A use after free vulnerability via race condition in MFC charger driver prior to SMR MAY-2021 Release 1 allows arbitrary write given a radio privilege is compromised.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 29 June 2023. US federal agencies were required to remediate it by 20 July 2023.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 0.4%, which is higher than 32.4% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2021-25394 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2021-25394.
What does CVE-2021-25394 affect?
CVE-2021-25394 affects Samsung Mobile Devices. A use after free vulnerability via race condition in MFC charger driver prior to SMR MAY-2021 Release 1 allows arbitrary write given a radio privilege is compromised.
How severe is CVE-2021-25394?
CVE-2021-25394 is rated MEDIUM with a CVSS base score of 6.4. EPSS puts the probability of exploitation in the next 30 days at 0.4%, higher than 32.4% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 20 July 2023.
How should organisations respond to CVE-2021-25394?
Apply the vendor patch for Samsung Mobile Devices as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.