Vulnerability details

CVE-2026-53704

Gstreamer1-plugins-ugly-free: gstreamer: out-of-bounds read in realmedia demuxer fileinfo metadata parser

CVSS 3.1

7.1High

Official 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.

CVSS scores

Score	Version	Source	Vector
7.1High	3.1	CVEProject cvelistV5 (CNA) (redhat)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H`

Affected products

Vendor	Product	Versions	Source
No product information recorded.

References and advisories

https://access.redhat.com/errata/RHSA-2026:36673 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36674 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:50688 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:50691 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-53704 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2487614 issue-trackingx_refsource_REDHAT

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Details

Published: 2026-06-15
Last updated: 2026-11-06
State: Published
Assigner (CNA): redhat

Exploit prediction (EPSS)

0.24%

Probability of exploitation in 30 days

15.7%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-125
Out-of-bounds Read