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Fencer Vulns
high 7.8

CVE-2026-3081 json

GStreamer H.266 Codec Parser Stack-based Buffer Overflow Remote Code Execution Vulnerability

published 2026-03-13 7 mo ago modified 2026-07-15 3 mo ago also EUVD-2026-12121

cvss
7.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

GStreamer H.266 Codec Parser 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 decoding units. 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-28839.

Patch / fix

  • gstreamer gstreamer 1.28.1
  • gst-plugins-bad1.0 Debian 13 1.26.2-3+deb13u1
  • gst-plugins-bad1.0 Debian 14 1.28.1-1

debian advisories DEBIAN-CVE-2026-3081

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-3081 updated cvss 7.8

GStreamer: GStreamer: Arbitrary code execution via H.266 codec parsing stack-based buffer overflow

  • Red Hat Enterprise Linux 6 gstreamer, gstreamer-tools Red Hat Enterprise Linux 7 gstreamer, gstreamer1, gstreamer-tools
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 8 gstreamer1, mingw32-gstreamer1, mingw64-gstreamer1 Red Hat Enterprise Linux 9 gstreamer1 Red Hat Enterprise Linux 10 gstreamer1
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
7 mo ago

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • GStreamer GStreamer
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.