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VulnerabilityPublished Updated

CVE-2026-53704: Red Hat Enterprise Linux 10 · Out-of-bounds Read

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 7.1 High.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
7.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 15% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10gstreamer1-plugins-ugly-freeAffected–Fixed in–
Red Hat Enterprise Linux 10.0 Extended Update Supportgstreamer1-plugins-ugly-freeAffected–Fixed in–
Red Hat Enterprise Linux 9gstreamer1-plugins-ugly-freeAffected–Fixed in–
Red Hat Enterprise Linux 9.6 Extended Update Supportgstreamer1-plugins-ugly-freeAffected–Fixed in–
Red Hat Enterprise Linux 7gstreamer1-plugins-ugly-freeAffected–Fixed in–
Red Hat Enterprise Linux 8gstreamer1-plugins-ugly-freeAffected–Fixed in–

AI-suggested

Red Hat has released an official security update for gstreamer1-plugins-ugly-free to address this vulnerability. Users should apply the update as described in the Red Hat advisory (RHSA-2026:36674). No effective workaround or mitigation other than patching is currently available or meets Red Hat's criteria for deployment and stability. Upgrading to Red Hat Enterprise Linux 9.8.1 or later versions where the fix is included is recommended.

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.

References

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