CVE-2026-53704

Publication date 15 June 2026

Last updated 8 October 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.1 · High

Score breakdown

Description

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.

Status

Package Ubuntu Release Status
gst-plugins-ugly1.0 26.04 LTS resolute
Fixed 1.28.2-1ubuntu0.1~esm1
25.10 questing Ignored end of life, was needs-triage
24.04 LTS noble
Fixed 1.24.1-1ubuntu0.1~esm1
22.04 LTS jammy
Fixed 1.20.1-1ubuntu0.1~esm1
20.04 LTS focal
Fixed 1.16.2-2ubuntu0.1~esm1
18.04 LTS bionic
Fixed 1.14.5-0ubuntu1~18.04.1+esm1
16.04 LTS xenial
Fixed 1.8.3-1ubuntu0.1+esm2

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro 30-day free trial

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.1 · High

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-8896-1
    • GStreamer Ugly Plugins vulnerabilities
    • 7 October 2026

Other references

Access our resources on patching vulnerabilities