High 7.8Published Mar 16, 2026

CVE-2026-3084GStreamer H.266 Codec Parser Integer Underflow Remote Code Execution Vulnerability.

Updated under an hour ago (2026-10-19 09:30 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-191
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jul 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

gstreamer gstreamer gstreamer:gstreamer	before 1.28.1	NVD

References

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/496e4f296e658fba7fd40027d3bbe6095633ec91vendor-advisory
https://www.zerodayinitiative.com/advisories/ZDI-26-169/third-party-advisory
https://access.redhat.com/security/cve/CVE-2026-3084
https://bugzilla.redhat.com/show_bug.cgi?id=2447483
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3084.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.