CVE-2026-53704: Red Hat Enterprise Linux 10

High severity, CVSS 7.1. EPSS: 0.5% chance of exploitation in the next 30 days.

A flaw was found in GStreamer's RealMedia demuxer in the gst-plugins-ugly package. When processing a RealMedia file containing a specially crafted FILEINFO metadata section, the demuxer parses variable-name and variable-value pairs using re_skip_pascal_string() without validating that offsets remain within the mapped buffer. Additionally, the element count controlling the parsing loop is read from attacker-controlled data without validation, which can cause an infinite loop. A crafted RealMedia file can cause the application to crash, hang, or potentially read limited adjacent memory contents.

Affected products

• Red Hat Red Hat Enterprise Linux 10: before 0:1.26.7-2.el10_2.1 (fixed in 0:1.26.7-2.el10_2.1)
• Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support: before 0:1.24.11-1.el10_0.2 (fixed in 0:1.24.11-1.el10_0.2)
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 9: before 0:1.22.12-6.el9_8.1 (fixed in 0:1.22.12-6.el9_8.1)
• Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support: before 0:1.22.12-4.el9_6.1 (fixed in 0:1.22.12-4.el9_6.1)

Published 2026-06-15. Last modified 2026-09-08.