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CVE-2026-53704— Gstreamer1-plugins-ugly-free: gstreamer: out-of-bounds read in realmedia demuxer fileinfo metadata parser

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RealMedia demuxer是gstreamer project组织的一个核心组件。 gstreamer project RealMedia demuxer存在缓冲区错误漏洞，该漏洞源于处理RealMedia文件时未验证缓冲区偏移和循环控制元素计数，可能导致应用程序崩溃、挂起或读取邻近内存内容。

CVSS 7.1 · High EPSS 0.46% · P38

Affected Version Matrix 6

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 0:1.26.7-2.el10_2.1< * unaffected
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:1.24.11-1.el10_0.2< * unaffected
Red Hat Red Hat Enterprise Linux 7 any unaffected
Red Hat Red Hat Enterprise Linux 8 any unaffected
Red Hat Red Hat Enterprise Linux 9 0:1.22.12-6.el9_8.1< * unaffected
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.22.12-4.el9_6.1< * unaffected
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I. Basic Information for CVE-2026-53704

Vulnerability Information
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Vulnerability Title
Gstreamer1-plugins-ugly-free: gstreamer: out-of-bounds read in realmedia demuxer fileinfo metadata parser
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
gstreamer project RealMedia demuxer 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RealMedia demuxer是gstreamer project组织的一个核心组件。 gstreamer project RealMedia demuxer存在缓冲区错误漏洞，该漏洞源于处理RealMedia文件时未验证缓冲区偏移和循环控制元素计数，可能导致应用程序崩溃、挂起或读取邻近内存内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 0:1.26.7-2.el10_2.1 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:1.24.11-1.el10_0.2 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat Red Hat Enterprise Linux 9 0:1.22.12-6.el9_8.1 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.22.12-4.el9_6.1 ~ * cpe:/a:redhat:rhel_eus:9.6::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

II. Public POCs for CVE-2026-53704

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III. Intelligence Information for CVE-2026-53704

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Vendor Advisories for CVE-2026-53704 (5)

Other References for CVE-2026-53704 (1)

Same Patch Batch · Red Hat · 2026-06-15 · 9 CVEs total

CVE-2026-52720 8.8 HIGH Gstreamer1-plugins-bad-free: gstreamer: heap buffer overflow via crafted vnc server rectan
CVE-2026-53705 7.6 HIGH Gstreamer1-plugins-good: gstreamer: heap buffer overflow in wavpack decoder via integer ov
CVE-2026-52722 7.1 HIGH Gstreamer1-plugins-bad-free: gstreamer: signed integer overflow in vmnc decoder cursor pay
CVE-2026-53703 7.1 HIGH Gstreamer1-plugins-ugly-free: gstreamer: out-of-bounds read in realmedia demuxer audio str
CVE-2026-52719 7.1 HIGH Gstreamer1-plugins-bad-free: gstreamer: out-of-bounds read via jpeg segment length validat
CVE-2026-52718 6.5 MEDIUM Gstreamer1-plugins-bad-free: gstreamer: denial of service via av1 tile_list_obu parser byt
CVE-2026-52721 5.3 MEDIUM Gstreamer1-plugins-bad-free: gstreamer: multiple out-of-bounds reads in pcapparse ipv4/tcp
CVE-2026-44188 5.3 MEDIUM Ansible-lightspeed: ansible lightspeed: session hijacking and unauthorized data access due

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-125

V. Comments for CVE-2026-53704

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