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CVE-2026-12892— Gstreamer1-plugins-bad-free: gstreamer1-plugins-bad: 1-byte heap out-of-bounds read in h.264 nal extension slice 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.

GStreamer是GStreamer组织开源的一套用于处理流媒体的框架。 GStreamer存在缓冲区错误漏洞，该漏洞源于GStreamer的gst-plugins-bad包在处理特制的H.264视频文件时，未能验证NAL单元在扩展头部之外是否包含足够数据，导致解析过程中发生1字节堆越界读取，可能造成应用程序崩溃或泄露堆内存。以下版本受到影响：Red Hat Enterprise Linux 10、Red Hat Enterprise Linux 6、Red Hat Enterprise Linux 7

CVSS 4.4 · Medium EPSS 0.16% · P4

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 5

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any affected
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
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I. Basic Information for CVE-2026-12892

Vulnerability Information
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Vulnerability Title
Gstreamer1-plugins-bad-free: gstreamer1-plugins-bad: 1-byte heap out-of-bounds read in h.264 nal extension slice parser
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur during parsing. This happens when the parser attempts to check slice boundary information without first verifying that the NAL unit contains enough data beyond the extension header. An attacker could exploit this by tricking a user into opening a malicious H.264 video file, potentially causing the application to crash or leak a single byte of heap memory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
GStreamer 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GStreamer是GStreamer组织开源的一套用于处理流媒体的框架。 GStreamer存在缓冲区错误漏洞，该漏洞源于GStreamer的gst-plugins-bad包在处理特制的H.264视频文件时，未能验证NAL单元在扩展头部之外是否包含足够数据，导致解析过程中发生1字节堆越界读取，可能造成应用程序崩溃或泄露堆内存。以下版本受到影响：Red Hat Enterprise Linux 10、Red Hat Enterprise Linux 6、Red Hat Enterprise Linux 7
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 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
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
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-12892

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III. Intelligence Information for CVE-2026-12892

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Patches & Fixes for CVE-2026-12892 (1)

Vendor Advisories for CVE-2026-12892 (1)

Other References for CVE-2026-12892 (1)

Same Patch Batch · Red Hat · 2026-06-23 · 12 CVEs total

CVE-2026-11807 9.6 CRITICAL Eda-server: websocket missing authorization allows credential theft via activation_id spoo
CVE-2026-12112 7.8 HIGH Foreman-mcp-server: mcp server: active session hijacking via insecure session state reuse
CVE-2026-10609 6.8 MEDIUM Openshift/cluster-logging-operator: cluster logging operator creates and forwards servicea
CVE-2026-11820 6.5 MEDIUM Community.general: community.general nexmo — api credentials exposed in get url query stri
CVE-2026-9073 6.2 MEDIUM Foreman-mcp-server: mcp server: insecure sensitive http header sanitization
CVE-2026-11819 5.5 MEDIUM Community.general: community.general keyring_info — os keyring passphrase returned in plai
CVE-2026-12969 5.3 MEDIUM Dnsmasq: dnsmasq: out-of-bounds read in find_soa() due to missing extrabytes validation
CVE-2026-55655 5.0 MEDIUM Openssh: local mitm of x11 forwarding via abstract unix socket pre-binding in red hat ente
CVE-2026-55653 4.3 MEDIUM Openssh: double free in red hat enterprise linux versions of openssh dh-gex client path du
CVE-2026-12891 4.3 MEDIUM Gstreamer1-plugins-bad-free: gstreamer1-plugins-bad: global buffer overflow (oob read) in
CVE-2026-55654 3.7 LOW Openssh: heap out-of-bounds read in red hat enterprise linux versions of openssh gssapi in

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-12892

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