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CVE-2026-73433— Gstreamer1-plugins-good: gstreamer: unsigned integer underflow in avidemux fujifilm strd parsing leading to out-of-bounds read/write

Quick assessment

Affected
GStreamer gst-plugins-good
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 gst-plugins-good是GStreamer组织的一个多媒体处理插件。 GStreamer gst-plugins-good 1.28.6之前版本存在数字错误漏洞，该漏洞源于解析AVI strd块中的FUJIFILM元数据时，gst_avi_demux_parse_strd()函数以固定偏移量递减剩余长度计数器而未验证足够数据，可能导致堆越界读取、越界写入、堆信息泄露和拒绝服务。

CVSS 6.6 · Medium EPSS 0.15% · P3
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I. Basic Information for CVE-2026-73433

Vulnerability Information
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Vulnerability Title
Gstreamer1-plugins-good: gstreamer: unsigned integer underflow in avidemux fujifilm strd parsing leading to out-of-bounds read/write
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in GStreamer gst-plugins-good (avidemux). When parsing FUJIFILM metadata in an AVI strd chunk, gst_avi_demux_parse_strd() decrements a remaining-length counter by fixed offsets (98 and 10 bytes) without verifying sufficient data remains. For crafted strd payloads of exactly 106 or 107 bytes, the counter underflows to a very large unsigned value, causing subsequent null-terminated string scanning to read far beyond the allocated heap buffer. Date-format normalization may also write beyond the buffer end. Confirmed impacts include heap out-of-bounds read, out-of-bounds write, heap information disclosure (adjacent data appearing in parsed metadata), and application crash/denial of service. The avidemux element is auto-plugged by playbin, decodebin, and gst-discoverer, so opening or previewing a crafted AVI is sufficient to trigger the issue. Fixed upstream in gst-plugins-good 1.28.6 (GStreamer-SA-2026-0072).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Vulnerability Title
GStreamer gst-plugins-good 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GStreamer gst-plugins-good是GStreamer组织的一个多媒体处理插件。 GStreamer gst-plugins-good 1.28.6之前版本存在数字错误漏洞，该漏洞源于解析AVI strd块中的FUJIFILM元数据时，gst_avi_demux_parse_strd()函数以固定偏移量递减剩余长度计数器而未验证足够数据，可能导致堆越界读取、越界写入、堆信息泄露和拒绝服务。
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
GStreamer gst-plugins-good 0 ~ 1.28.6 -
Red Hat Red Hat Enterprise Linux 10 0:1.26.7-2.el10_2.5 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:1.24.11-1.el10_0.4 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.10.4-4.el7_9.3 ~ * cpe:/o:redhat:rhel_els:7
Red Hat Red Hat Enterprise Linux 8 0:1.16.1-7.el8_10.3 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.16.1-4.el8_4.2 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:1.16.1-4.el8_4.2 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:1.16.1-4.el8_6.3 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:1.16.1-4.el8_6.3 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:1.16.1-5.el8_8.3 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:1.16.1-5.el8_8.3 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red Hat Red Hat Enterprise Linux 9 0:1.22.12-7.el9_8.4 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:1.18.4-8.el9_2.3 ~ * cpe:/a:redhat:rhel_e4s:9.2::appstream
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:1.22.1-4.el9_4.3 ~ * cpe:/a:redhat:rhel_e4s:9.4::appstream
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.22.12-5.el9_6.3 ~ * cpe:/a:redhat:rhel_eus:9.6::appstream

II. Public POCs for CVE-2026-73433

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III. Intelligence Information for CVE-2026-73433

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Patches & Fixes for CVE-2026-73433 (1)

Vendor Advisories for CVE-2026-73433 (12)

Other References for CVE-2026-73433 (1)

IV. Related Vulnerabilities

Same product: gst-plugins-good
Same vendor: GStreamer
Same weakness: CWE-191

V. Comments for CVE-2026-73433

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