CVE-2021-25487

CVE-2021-25487 is a high-severity (CVSS 7.3) vulnerability in Samsung Mobile Devices. CISA added it to the Known Exploited Vulnerabilities catalog on June 29, 2023, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by July 20, 2023. CISA does not currently list it as used in ransomware campaigns. Samsung has 15 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

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.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

• https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10
• https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25487