CVE-2026-5056
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the parsing of UncompressedFrameConfigBox structures. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29392.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the parsing of UncompressedFrameConfigBox structures. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29392.
- Record
CVE-2026-5056- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-121
- Updated
- 2026-11-02
EUVDEUVD-2026-50497
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the parsing of UncompressedFrameConfigBox structures. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29392.
- Record
EUVD-2026-50497- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-w72g-mjg9-9cfg
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This...
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the parsing of UncompressedFrameConfigBox structures. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29392.
- Record
GHSA-w72g-mjg9-9cfg- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-121
- Updated
- 2026-11-02
NVD
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the parsing of UncompressedFrameConfigBox structures. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29392.
- Record
CVE-2026-5056- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-121
- Updated
- 2026-11-02
OSVALPINE-CVE-2026-5056
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the parsing of UncompressedFrameConfigBox structures. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29392.
- Record
ALPINE-CVE-2026-5056- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
OSV
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the parsing of UncompressedFrameConfigBox structures. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29392.
- Record
CVE-2026-5056- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-121
- Updated
- 2026-11-02
Show 6 moreShow less
OSVDEBIAN-CVE-2026-5056
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the parsing of UncompressedFrameConfigBox structures. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29392.
- Record
DEBIAN-CVE-2026-5056- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVRHSA-2026:49508
Red Hat Security Advisory: gstreamer1-plugins-good security update
- Record
RHSA-2026:49508- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVRLSA-2026:49508
Important: gstreamer1-plugins-good security update
GStreamer is a streaming media framework based on graphs of filters which operate on media data. The gstreamer1-plugins-good packages contain a collection of well-supported plug-ins of good quality and under the LGPL license.
Security Fix(es):
- gstreamer: GStreamer: Arbitrary code execution via stack-based buffer overflow in qtdemux (CVE-2026-5056)
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.
- Record
RLSA-2026:49508- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-5056
GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the parsing of UncompressedFrameConfigBox structures. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29392.
- Record
UBUNTU-CVE-2026-5056- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVALSA-2026:49508 No score
Important: gstreamer1-plugins-good security update
GStreamer is a streaming media framework based on graphs of filters which operate on media data. The gstreamer1-plugins-good packages contain a collection of well-supported plug-ins of good quality and under the LGPL license.
Security Fix(es):
- gstreamer: GStreamer: Arbitrary code execution via stack-based buffer overflow in qtdemux (CVE-2026-5056)
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.
- Record
ALSA-2026:49508- Updated
- 2026-11-02
OSVUSN-8285-1 No score
gst-plugins-good1.0 vulnerability
It was discovered that GStreamer Good Plugins incorrectly handled certain MOV/MP4 media files. A remote attacker could use this issue to cause GStreamer Good Plugins to crash, resulting in a denial of service, or possibly execute arbitrary code.
- Record
USN-8285-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
gst-plugins-goodAlpine:v3.24 |
before 1.26.3-r0 | 1.26.3-r0 |
gstreamer1-plugins-goodAlmaLinux:10 |
before 1.26.7-2.el10_2.2 | 1.26.7-2.el10_2.2 |
gstreamer1-plugins-good-gtkAlmaLinux:10 |
before 1.26.7-2.el10_2.2 | 1.26.7-2.el10_2.2 |
gst-plugins-good1.0Debian:13 |
before 1.26.2-1+deb13u1, plus listed versions 1.26.2-1 |
1.26.2-1+deb13u1 |
gst-plugins-good1.0Debian:14 |
before 1.28.2-1, plus listed versions 1.26.10-11.26.2-11.26.3-11.26.4-11.26.5-1 Show 14 moreShow less1.26.5-21.26.5-2+hurd.11.26.5-31.26.6-11.26.7-11.26.8-11.26.9-11.27.1-11.27.2-11.27.50-11.27.50-21.27.90-11.28.0-11.28.1-1 |
1.28.2-1 |
gstreamer1-plugins-goodRed Hat:enterprise_linux:10.2 |
before 0:1.26.7-2.el10_2.2 | 0:1.26.7-2.el10_2.2 |
gstreamer1-plugins-good-debuginfoRed Hat:enterprise_linux:10.2 |
before 0:1.26.7-2.el10_2.2 | 0:1.26.7-2.el10_2.2 |
gstreamer1-plugins-good-debugsourceRed Hat:enterprise_linux:10.2 |
before 0:1.26.7-2.el10_2.2 | 0:1.26.7-2.el10_2.2 |
gstreamer1-plugins-good-gtkRed Hat:enterprise_linux:10.2 |
before 0:1.26.7-2.el10_2.2 | 0:1.26.7-2.el10_2.2 |
gstreamer1-plugins-good-gtk-debuginfoRed Hat:enterprise_linux:10.2 |
before 0:1.26.7-2.el10_2.2 | 0:1.26.7-2.el10_2.2 |
gstreamer1-plugins-good-qt6-debuginfoRed Hat:enterprise_linux:10.2 |
before 0:1.26.7-2.el10_2.2 | 0:1.26.7-2.el10_2.2 |
gstreamer1-plugins-goodRocky Linux:10 |
before 0:1.26.7-2.el10_2.2 | 0:1.26.7-2.el10_2.2 |
gst-plugins-good1.0Ubuntu:25.10 |
before 1.26.5-1ubuntu2.2, plus listed versions 1.26.0-1ubuntu21.26.0-1ubuntu31.26.2-1ubuntu11.26.4-1ubuntu11.26.5-1ubuntu11.26.5-1ubuntu21.26.5-1ubuntu2.1 |
1.26.5-1ubuntu2.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-5056 is a high vulnerability (CVSS 7.8) in Gstreamer, published May 5, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.34%, the 27th percentile. Fixed in gst-plugins-good 1.26.3-r0.
References
zerodayinitiative.com/advisories/ZDI-26-283
gitlab.freedesktop.org/api/v4/projects/gstreamer%2Fgstreamer/repository/files/security-advisories%2Fsa-2026-0016.md/raw?ref=main
openwall.com/lists/oss-security/2026/05/01/1
nvd.nist.gov/vuln/detail/CVE-2026-5056
github.com/advisories/GHSA-w72g-mjg9-9cfg
security.alpinelinux.org/vuln/CVE-2026-5056
Show 14 moreShow less
access.redhat.com/errata/RHSA-2026:49508
bugzilla.redhat.com/2508623
errata.almalinux.org/10/ALSA-2026-49508.html
security-tracker.debian.org/tracker/CVE-2026-5056
security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_49508.json
cve.org/CVERecord?id=CVE-2026-5056
errata.rockylinux.org/RLSA-2026:49508
ubuntu.com/security/CVE-2026-5056
gstreamer.freedesktop.org/security/sa-2026-0016.html