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Samsung released its monthly Android security updates, addressing a vulnerability exploited in zero-day attacks. CVE-2025-21043 (CVSS score: 8.8) is a vulnerability that allows an out-of-bounds write, potentially leading to arbitrary code execution.
“Out-of-bounds Write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code,” Samsung said in an advisory. “The patch fixed the incorrect implementation.”
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A 2020 report from Google Project Zero states that libimagecodec.quram.so is a proprietary image parsing library by Quramsoft that supports multiple image formats.
A critical issue identified by the South Korean electronics giant impacts Android versions 13 to 16. The company was privately informed about the vulnerability on August 13, 2025.
Samsung did not share any specifics on how the vulnerability is being exploited in attacks and who may be behind these efforts. However, it acknowledged that “an exploit for this issue has existed in the wild.”
The update follows Google’s announcement of fixing two security vulnerabilities in Android (CVE-2025-38352 and CVE-2025-48543) that have been used in targeted attacks.
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