Out-of-bounds Read in Red Hat Enterprise Linux 10
CVE-2026-53704
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 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.
EPSS exploit prediction
EPSS: 0.005 (37.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.005 · change: +0.002
Affected products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 10.0 Extended Update Support — versions 0:1.24.11-1.el10_0.2
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9 — versions 0:1.22.12-6.el9_8.1
- Red Hat Enterprise Linux 9.6 Extended Update Support — versions 0:1.22.12-4.el9_6.1
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-53704 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:36674 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:50688 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:50691 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:36673 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-53704?
- CVE-2026-53704 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-06-15.
- How severe is CVE-2026-53704?
- High severity. CVSS v3 base score is 7.1 out of 10.