CVE-2025-32907 identifies a vulnerability in libsoup, a widely used HTTP client/server library in GNOME and other Linux-based environments, related to its implementation of HTTP range requests. The flaw arises because the server does not properly handle repeated requests for the same byte range within a single HTTP request, leading to excessive platform resource consumption, specifically memory. An attacker can craft a malicious HTTP request that includes multiple identical range specifications, causing the server to allocate large amounts of memory unnecessarily. This resource exhaustion can degrade server performance and potentially lead to partial denial of service conditions, although it does not cause a complete outage. The vulnerability is exploitable remotely without requiring authentication or user interaction, increasing its risk profile. The CVSS v3.1 base score of 5.3 reflects a medium severity, with attack vector being network-based, low attack complexity, no privileges required, and no user interaction needed. The impact is limited to availability, with no direct effect on confidentiality or integrity. No known exploits are currently reported in the wild, and no patches have been linked yet, but the vulnerability is publicly disclosed and should be addressed promptly. The affected versions are not specifically enumerated beyond a placeholder, but any deployment using vulnerable libsoup versions that handle HTTP range requests is at risk. This vulnerability is particularly relevant for web servers, proxies, or applications that rely on libsoup for HTTP communications and support range requests.

For European organizations, this vulnerability could lead to degraded service availability and performance issues on servers using libsoup for HTTP communications, especially those handling range requests such as media streaming, file servers, or proxy services. While it does not enable full denial of service or data compromise, the excessive memory consumption can cause resource exhaustion, leading to slowdowns or crashes under sustained attack. This can disrupt business operations, degrade user experience, and increase operational costs due to incident response and recovery efforts. Organizations with internet-facing services are at higher risk, as exploitation requires only network access. The impact is more pronounced in environments with limited memory resources or high traffic volumes. Additionally, the lack of authentication or user interaction requirements means attackers can exploit this vulnerability at scale, potentially affecting critical infrastructure or services. European entities in sectors such as telecommunications, media, and public services that utilize open-source HTTP libraries may face increased exposure. The vulnerability also poses risks to cloud service providers and hosting companies operating in Europe that offer services based on vulnerable libsoup versions.

To mitigate CVE-2025-32907, organizations should first monitor vendor advisories and apply official patches or updates to libsoup as soon as they become available. In the interim, implement network-level protections such as rate limiting and filtering of HTTP range requests to detect and block suspicious patterns involving repeated identical ranges. Deploy Web Application Firewalls (WAFs) or Intrusion Prevention Systems (IPS) with custom rules targeting abnormal range request behavior. Review and harden server configurations to limit resource allocation per request and enable logging of HTTP range requests for anomaly detection. Consider isolating vulnerable services behind reverse proxies that can enforce stricter request validation. Conduct regular memory usage monitoring and alerting to identify potential exploitation attempts early. Additionally, educate development and operations teams about the risks of improper HTTP range request handling and encourage secure coding practices. For critical services, evaluate alternative libraries or software components that do not exhibit this vulnerability. Finally, maintain an incident response plan that includes steps for handling resource exhaustion attacks to minimize downtime and impact.