Out-of-bounds write in Samsung Blockchain Keystore - CVE-2025-21020
Published: August 5, 2025
Vulnerability identifier: #VU113644
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-21020
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Samsung
Affected software:
Samsung Blockchain Keystore
Samsung Blockchain Keystore
Detailed vulnerability description
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in creating bitmap images. A local user can trigger an out-of-bounds write and execute arbitrary code on the target system.
How to mitigate CVE-2025-21020
Install updates from vendor's website.