Samsung rlottie Numeric Truncation Vulnerability (CVE-2026-8916) Enables Remote Code Execution
A numeric truncation vulnerability in Samsung's rlottie library, tracked as CVE-2026-8916, allows remote attackers to execute arbitrary code on affected systems.
The Zero Day Initiative (ZDI) has disclosed a new vulnerability in Samsung's rlottie library, a lightweight animation rendering engine used across Samsung mobile devices and other platforms. Tracked as ZDI-26-359 and assigned CVE-2026-8916, the flaw is a numeric truncation issue that can lead to remote code execution (RCE) with a CVSS score of 7.8.
The vulnerability arises when rlottie processes specially crafted animation files. A numeric truncation error occurs during integer arithmetic, allowing an attacker to corrupt memory in a way that can be leveraged for arbitrary code execution. Exploitation requires user interaction — typically opening a malicious file or visiting a page that triggers rlottie rendering — but the attack vector may vary depending on how the library is integrated into an application.
Samsung rlottie is widely deployed, particularly in Samsung's mobile ecosystem where it handles animated stickers, Lottie animations in messaging apps, and UI transitions. The library is also used in third-party applications that incorporate Samsung's open-source rlottie code. Given the library's broad adoption, the vulnerability could potentially affect millions of devices, though Samsung has not yet released a public patch or advisory specifically addressing CVE-2026-8916.
The ZDI advisory notes that successful exploitation would grant an attacker the same privileges as the affected application. In a mobile context, this could mean access to app data, camera, microphone, or other sensitive resources depending on the permissions granted to the vulnerable app. The vulnerability does not require authentication, but the need for user interaction somewhat reduces the risk of automated large-scale attacks.
This disclosure follows closely on the heels of seven other medium-severity memory corruption vulnerabilities in Samsung rlottie that were disclosed on June 4, 2026. Those flaws included out-of-bounds writes, integer overflows, and uncontrolled recursion issues. The addition of CVE-2026-8916 brings the total number of publicly known rlottie vulnerabilities to eight in just over a week, signaling a concentrated security review of the library.
No in-the-wild exploitation has been reported for CVE-2026-8916 as of the advisory's publication. However, the ZDI routinely discloses vulnerabilities after a responsible disclosure period, and the publication of technical details often spurs proof-of-concept development. Users and organizations that rely on Samsung rlottie should monitor Samsung's security updates and consider restricting the library's exposure to untrusted animation files until a patch is available.
The recurring pattern of vulnerabilities in media parsing libraries — from rlottie to libwebp to FreeType — underscores the challenge of securing complex file format handlers. These components are often inherited from open-source projects and integrated into products with minimal security review. The Samsung rlottie case serves as a reminder that even widely used, well-maintained libraries can harbor subtle bugs with serious consequences.