Vulnerability-Lookup

RHSA-2026:36673

Vulnerability from csaf_redhat - Published: 2026-07-08 12:02 - Updated: 2026-07-08 19:27

Summary

Red Hat Security Advisory: gstreamer1-plugins-ugly-free security update

Severity

Moderate

Notes

Topic: An update for gstreamer1-plugins-ugly-free is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: GStreamer is a streaming media framework, based on graphs of elements which operate on media data. This package contains plug-ins whose license is not fully compatible with LGPL. Security Fix(es): * gstreamer1-plugins-ugly-free: GStreamer: Out-of-bounds read in RealMedia demuxer audio stream header parser (CVE-2026-53703) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-53703

A vulnerability was found in the GStreamer RealMedia demuxer (gst-plugins-ugly). When processing a RealMedia (.rm) file, the demuxer parses MDPR (media properties) chunks to configure audio streams. For audio stream header versions 4 and 5, the parser reads fields such as codec type, packet size, sample rate, channel count, and extra codec data length from fixed offsets within the chunk without first checking that the chunk contains enough data. If a malicious file provides an MDPR chunk that is too small to contain a complete audio stream header, the parser reads beyond the end of the buffer. This can cause the application to crash. In some cases, bytes read past the buffer boundary may be incorporated into stream metadata, which could result in limited information disclosure.

7.1 (High)


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

CWE-125 - Out-of-bounds Read

Affected products

Fixed 10 products

Product	Version	Remediation
Unresolved product id: AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.src	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.x86_64	—	Vendor Fix fix Workaround

Threats

Impact Moderate

References

8 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:36673	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2487613	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-53703	self
https://bugzilla.redhat.com/show_bug.cgi?id=2487613	external
https://www.cve.org/CVERecord?id=CVE-2026-53703	external
https://nvd.nist.gov/vuln/detail/CVE-2026-53703	external

Acknowledgments

Tianshuo Han

JSON

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    {
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      "cwe": {
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        "name": "Out-of-bounds Read"
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          "text": "A vulnerability was found in the GStreamer RealMedia demuxer (gst-plugins-ugly). When processing a RealMedia (.rm) file, the demuxer parses MDPR (media properties) chunks to configure audio streams. For audio stream header versions 4 and 5, the parser reads fields such as codec type, packet size, sample rate, channel count, and extra codec data length from fixed offsets within the chunk without first checking that the chunk contains enough data. If a malicious file provides an MDPR chunk that is too small to contain a complete audio stream header, the parser reads beyond the end of the buffer. This can cause the application to crash. In some cases, bytes read past the buffer boundary may be incorporated into stream metadata, which could result in limited information disclosure.",
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          "title": "Vulnerability summary"
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        {
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          "text": "This flaw affects gstreamer1-plugins-ugly-free as shipped in Red Hat Enterprise Linux. RealMedia is a legacy container format with limited real-world usage. The upstream maintainer confirmed this is an out-of-bounds read that can cause crashes and may leak adjacent memory into stream metadata. No code execution or memory corruption path has been identified. No upstream fix is available yet as the surrounding rmdemux code requires a broader rewrite.",
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        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.aarch64",
          "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.ppc64le",
          "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.src",
          "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.x86_64",
          "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.aarch64",
          "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.ppc64le",
          "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.x86_64",
          "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.aarch64",
          "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.ppc64le",
          "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-53703"
        },
        {
          "category": "external",
          "summary": "RHBZ#2487613",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2487613"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-53703",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-53703"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-53703",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53703"
        }
      ],
      "release_date": "2026-06-12T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-08T12:02:53+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
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            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.ppc64le",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.src",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.x86_64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.aarch64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.ppc64le",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.x86_64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.aarch64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.ppc64le",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:36673"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
          "product_ids": [
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            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.ppc64le",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.src",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.x86_64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.aarch64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.ppc64le",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.x86_64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.aarch64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.ppc64le",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.aarch64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.ppc64le",
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            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.1.x86_64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.aarch64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.ppc64le",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debuginfo-0:1.26.7-2.el10_2.1.x86_64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.aarch64",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.ppc64le",
            "AppStream-10.2.Z:gstreamer1-plugins-ugly-free-debugsource-0:1.26.7-2.el10_2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "gstreamer1-plugins-ugly-free: GStreamer: Out-of-bounds read in RealMedia demuxer audio stream header parser"
    }
  ]
}

CVE-2026-53703 (GCVE-0-2026-53703)

Vulnerability from cvelistv5 – Published: 2026-06-15 19:10 – Updated: 2026-07-08 13:14

Title

Gstreamer1-plugins-ugly-free: gstreamer: out-of-bounds read in realmedia demuxer audio stream header parser

Summary

Severity

7.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - Out-of-bounds Read

Assigner

redhat

References

4 references

URL	Tags
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/security/cve/CVE-2026-53703	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2487613	issue-trackingx_refsource_REDHAT

Impacted products

4 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:1.26.7-2.el10_2.1 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux 9	Unaffected: 0:1.22.12-6.el9_8.1 , < * (rpm) cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8

Date Public

2026-06-12 00:00

Credits

Red Hat would like to thank Tianshuo Han for reporting this issue.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2026:36673

CVE-2026-53703 (GCVE-0-2026-53703)

Tags

Sightings

Nomenclature