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7.8
CVE-2026-3084: GStreamer H.266 parser can let attackers run code
CVE-2026-3084 · published 7 months ago
Summary
The GStreamer multimedia library’s H.266 codec component may accept specially crafted video data that causes a calculation error, allowing a remote attacker to run their own code on the system. This affects installations that include the GStreamer core or the bad plugins packages from Debian or Canonical. Update to the latest patched versions or disable the H.266 parser until a fix is applied.
What to do
- Update debian gst-plugins-bad1.0 to version 1.28.1-1.
- Update debian gst-plugins-bad1.0 to version 1.26.2-3+deb13u1.
- Update gstreamer gstreamer to version 1.28.1 or later.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Debian:13 | debian | gst-plugins-bad1.0 |
< 1.26.2-3+deb13u1 Fix: upgrade to 1.26.2-3+deb13u1
|
| Debian:14 | debian | gst-plugins-bad1.0 |
< 1.28.1-1 Fix: upgrade to 1.28.1-1
|
| – | gstreamer | gstreamer |
< 1.28.1 1c6e163aa33962f5ee4a87d29319ccdd5cb67612 cpe:2.3:a:gstreamer:gstreamer:*:*:*:*:*:*:*:* |
| Ubuntu:Pro:14.04:LTS | canonical | gst-plugins-bad1.0 | All versions |
Original advisory text
GStreamer H.266 Codec Parser Integer Underflow Remote Code Execution Vulnerability
GStreamer H.266 Codec Parser Integer Underflow 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 picture partitions. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28910.
The specific flaw exists within the parsing of picture partitions. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28910.
References
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3084.j... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-3084 Vendor Advisory
- https://security-tracker.debian.org/tracker/CVE-2026-3084 Vendor Advisory
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/496e4f296e658fba7fd4... Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-26-169/ Vendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3084.json URL
- https://access.redhat.com/security/cve/CVE-2026-3084 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2447483 Third Party Advisory
- https://ubuntu.com/security/CVE-2026-3084 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-3084 Third Party Advisory
- https://gstreamer.freedesktop.org/security/sa-2026-0011.html Third Party Advisory
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/10887 Third Party Advisory
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker full control
Type
CWE-191Integer Underflow (Wrap or Wraparound)
Timeline
Published13 Mar 2026
Updated4 Nov 2026
First seen14 Mar 2026
Sources
DEBIAN-CVE-2026-3084 · OSV
CVE-2026-3084 · MITRE
CVE-2026-3084 · NVD
UBUNTU-CVE-2026-3084 · OSV
CVE-2026-3084 · OSV
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