CVE-2025-57615 is a high-severity integer overflow vulnerability identified in the rust-ffmpeg library version 0.3.0, specifically introduced after commit 5ac0527. The flaw exists in the Vector::new constructor function, where an unchecked cast from a usize parameter to a c_int occurs. This improper casting can lead to a negative value being passed to the underlying C function sws_allocVec(), which is responsible for vector allocation in the FFmpeg scaling library. Due to this negative value, a null pointer dereference can occur, causing the application to crash and resulting in a denial of service (DoS) condition. The vulnerability does not impact confidentiality or integrity but severely affects availability by crashing processes that rely on rust-ffmpeg for media processing. Exploitation requires no privileges or user interaction and can be triggered remotely if the vulnerable library is exposed to untrusted input. The CVSS v3.1 base score is 7.5, reflecting the network attack vector, low attack complexity, no privileges required, no user interaction, unchanged scope, no impact on confidentiality or integrity, but high impact on availability. No known exploits are currently reported in the wild, and no patches have been linked yet, indicating that affected users should prioritize monitoring and mitigation.

For European organizations, the impact of this vulnerability primarily concerns any systems or services that utilize rust-ffmpeg 0.3.0 for media processing tasks, such as video streaming platforms, multimedia content delivery networks, or internal media handling tools. A successful exploitation could cause service outages or crashes, disrupting business operations, degrading user experience, and potentially causing financial losses or reputational damage. Sectors like broadcasting, online education, media production, and telecommunications in Europe could be particularly affected. Since the vulnerability leads to denial of service without data compromise, the risk is operational continuity rather than data breach. However, critical infrastructure relying on media processing might face cascading effects if availability is compromised. The lack of required privileges or user interaction means attackers could remotely trigger the DoS condition, increasing the threat surface for exposed services.

European organizations should immediately audit their software inventories to identify any usage of rust-ffmpeg version 0.3.0 or later builds after commit 5ac0527. Until an official patch is released, organizations should consider the following specific mitigations: 1) Implement input validation and sanitization on all media inputs processed by rust-ffmpeg to prevent maliciously crafted inputs that could trigger the overflow. 2) Employ runtime monitoring and anomaly detection to identify crashes or abnormal terminations of media processing services, enabling rapid incident response. 3) Isolate media processing components in sandboxed or containerized environments to limit the impact of crashes on broader systems. 4) Where feasible, temporarily disable or replace rust-ffmpeg-based components with alternative libraries not affected by this vulnerability. 5) Stay updated with vendor advisories and apply patches promptly once available. 6) Use network-level protections such as Web Application Firewalls (WAFs) or Intrusion Prevention Systems (IPS) to detect and block exploit attempts targeting this vulnerability.