CVE-2026-19389 Red Hat CVE debrief

Who should care

Users and administrators of GStreamer-based applications, especially those processing untrusted media files, should be aware of these vulnerabilities and take steps to mitigate them. This includes reviewing the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance, and planning vendor-supported updates or mitigations through normal change control where exposure is confirmed. Relevant monitoring, detection, and logs for exposed assets should be checked for extra review, and exceptions, retested remediated assets, and closed items should be tracked only after evidence is documented. GStreamer users should prioritize patching to prevent potential crashes or information disclosure when processing untrusted media. Operators, platforms, vulnerability-management, and security teams should review compensating controls for exposed systems while remediation is scheduled and verified. Asset inventory and source tracking should be considered to enhance defensive guidance and response to potential denial of service or information disclosure incidents. Monitoring and incident response plans should be reviewed to ensure readiness in case of an attack. Security teams should also consider the potential impact on their organization's specific systems and take steps to mitigate the vulnerabilities. The CVE record indicates multiple integer overflow and underflow vulnerabilities in the GStreamer gst-plugins-ugly ASF demuxer, but detailed information about affected products and versions is not provided in the source corpus. Therefore, a thorough review of the system and its components is necessary to ensure that all potential vulnerabilities are addressed. Additionally, the implementation of compensating controls, such as restricting processing of untrusted media files, can help mitigate the risk of these vulnerabilities. By taking these steps, organizations can reduce the risk of exploitation and minimize the potential impact of a successful attack. It is essential to prioritize patching and implement a comprehensive security strategy to protect against these vulnerabilities. This includes staying informed about the latest security advis

Technical summary

Multiple integer overflow and underflow vulnerabilities were found in the GStreamer gst-plugins-ugly ASF demuxer when parsing header objects from crafted ASF, WMV, or WMA files. Insufficient validation of attacker-controlled length and size values can bypass bounds checks and cause out-of-bounds heap reads. This can result in application crashes, denial of service, or limited information disclosure when untrusted media is processed. Affected product deployments should be reviewed for potential exposure, and compensating controls should be considered while remediation is scheduled and verified.

Defensive priority

GStreamer users should prioritize patching to prevent potential crashes or information disclosure when processing untrusted media.

Recommended defensive actions

• Apply patches or updates provided by the vendor to fix the vulnerabilities
• Restrict processing of untrusted media files
• Monitor for and respond to potential denial of service or information disclosure incidents
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record indicates multiple integer overflow and underflow vulnerabilities in the GStreamer gst-plugins-ugly ASF demuxer. However, detailed information about affected products and versions is not provided in the source corpus.

Official resources