CVE-2021-25487
Samsung Mobile Devices Out-of-Bounds Read Vulnerability
Samsung Mobile Devices
Lack of boundary checking of a buffer in set_skb_priv() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read and it results in arbitrary code execution by dereference of invalid function pointer.
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 0.6%, which is higher than 50.7% 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:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Frequently asked questions
Is CVE-2021-25487 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2021-25487.
What does CVE-2021-25487 affect?
CVE-2021-25487 affects Samsung Mobile Devices. Lack of boundary checking of a buffer in set_skb_priv() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read and it results in arbitrary code execution by dereference of invalid function pointer.
How severe is CVE-2021-25487?
CVE-2021-25487 is rated HIGH with a CVSS base score of 7.3. EPSS puts the probability of exploitation in the next 30 days at 0.6%, higher than 50.7% 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-2021-25487?
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.