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CVE-2026-125704— Gstreamer: gstreamer: use-after-free in gstreamer core buffer value deserialization

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.

在 GStreamer 核心缓冲区的值反序列化过程中发现了一个释放后使用（use-after-free）漏洞。当精心构造的序列化缓冲区数据包含无效字符时，错误处理路径会在取消映射之前释放已映射的缓冲区。解析不可信编解码能力（caps）或结构数据的应用程序可能会发生崩溃；面向网络的 GStreamer 数据协议（Data Protocol）接收器无需用户交互即可处理此类数据。目前尚未确认是否存在其他影响。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-125704

Vulnerability Information
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Vulnerability Title
Gstreamer: gstreamer: use-after-free in gstreamer core buffer value deserialization
Source: CVE Program / CVE List V5
Vulnerability Description
A use-after-free flaw was found in GStreamer core buffer value deserialization. When serialized buffer text contains an invalid character, an error path frees a mapped buffer before unmapping it. Applications that parse untrusted caps or structure data can reach a freed-buffer read and may crash. A network-facing GStreamer Data Protocol receiver can process such caps data without user interaction; further impact has not been established.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/a:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:rhel_els:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/a:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/a:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-125704

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III. Intelligence Information for CVE-2026-125704

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Other References for CVE-2026-125704 (4)

Same Patch Batch · Red Hat · 2026-11-10 · 11 CVEs total

CVE-2026-120399 7.5 HIGH Flightctl-api: flightctl-remote-access: flightctl: unbounded tls handshake in conncontext
CVE-2026-124747 7.5 HIGH Busybox: heap buffer overflow in wget ftp resume when the resume offset exceeds the report
CVE-2026-125712 7.5 HIGH Gst-plugins-base: gst-plugins-base: missing bounds checks in rtcp sdes packet parsing
CVE-2026-125652 6.8 MEDIUM Keycloak-services: keycloak-services: client-level mandatory pkce bypass via login-actions
CVE-2026-125672 6.6 MEDIUM Cockpit: cockpit-storaged: tang keyserver address from an untrusted luks header clevis tok
CVE-2026-121885 6.5 MEDIUM Podman: untrusted image labels allow auto-update to restart arbitrary systemd units
CVE-2026-125707 6.1 MEDIUM Gst-plugins-bad: gst-plugins-bad: off-by-one write in mxf demuxer temporal offset table
CVE-2026-125706 5.5 MEDIUM Gst-plugins-bad: gst-plugins-bad: missing bounds checks in mpeg ps pes header parsing
CVE-2026-125703 5.5 MEDIUM Gst-plugins-bad: gst-plugins-bad: bounds check errors in mxf vanc packet handling
CVE-2026-125709 4.2 MEDIUM Libstdc++: overflow leaves streambuf in inconsistent state on i/o error.

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-416