Out-of-bounds write in Samsung Mobile Firmware - CVE-2025-21043
Published: September 12, 2025
Vulnerability identifier: #VU115194
CSH Severity: Critical
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-21043
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input within libimagecodec.quram.so. A remote attacker can trick the victim into opening a specially crafted image file, trigger an out-of-bounds write and execute arbitrary code on the target system.
Note, the vulnerability is being actively exploited in the wild.
Affected software
Samsung Mobile Firmware
How to mitigate CVE-2025-21043
Install updates from vendor's website.
Samsung Mobile Firmware - update to SMR-SEP-2025