CVE-2025-49178

A flaw was found in the X server's request handling. Non-zero 'bytes to ignore' in a client's request can cause the server to skip processing another client's request, potentially leading to a denial of service.

This vulnerability is rated as a moderate severity because the flaw exists in the X server’s request handling logic, where the “bytes to ignore” field in a client request is not properly validated. A malicious client can submit a request specifying a non-zero 'bytes to ignore' value that exceeds the actual request size, causing the server to advance its internal input pointer incorrectly. As a result, the server may skip over pending requests from other clients, disrupting normal processing and effectively denying service to legitimate users. This vulnerability primarily impacts system availability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.