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Fencer Vulns
medium 4.4

CVE-2026-88914 json

Gstreamer1-plugins-good: gstreamer: integer overflow and out-of-bounds read in qtdemux cea-608 closed-caption parser

published 2026-09-11 59 d ago modified 2026-11-06 3 d ago also EUVD-2026-75905

cvss
4.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

A flaw was found in GStreamer's gst-plugins-good isomp4 plugin. When processing a specially crafted MP4 or MOV file containing CEA-608 closed-caption data, an integer overflow in 32-bit unsigned arithmetic can bypass a bounds check in the caption parser. This leads to an out-of-bounds heap read of up to 244 bytes, which is then included in the downstream caption output. An attacker could exploit this by tricking a user into opening a malicious media file, potentially resulting in disclosure of adjacent heap memory or application crash.

Patch / fix

  • gst-plugins-good1.0 Debian 12 1.22.0-5+deb12u4
  • gst-plugins-good1.0 Debian 14 1.28.7-1

debian advisories DEBIAN-CVE-2026-88914

  • gst-plugins-good1.0 Ubuntu 22.04 LTS 1.20.3-0ubuntu1.10
  • gst-plugins-good1.0 Ubuntu 24.04 LTS 1.24.2-1ubuntu1.8
  • gst-plugins-good1.0 Ubuntu 26.04 LTS 1.28.2-2ubuntu0.4
  • gst-plugins-good1.0 Ubuntu Pro 20.04 LTS 1.16.3-0ubuntu1.3+esm4

ubuntu advisories UBUNTU-CVE-2026-88914

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2026-88914 updated cvss 4.4

gstreamer1-plugins-good: gstreamer: integer overflow and out-of-bounds read in qtdemux CEA-608 closed-caption parser

  • Red Hat Enterprise Linux 6 gstreamer-plugins-good Red Hat Enterprise Linux 7 gstreamer-plugins-good, gstreamer1-plugins-good Red Hat Enterprise Linux 8 gstreamer1-plugins-good, gstreamer1-plugins-good-gtk Red Hat Enterprise Linux 9 gstreamer1-plugins-good, gstreamer1-plugins-good-gtk Red Hat Enterprise Linux 10 gstreamer1-plugins-good
    affected: workaround, no fix available “No mitigation is currently available that meets Red Hat Product Security's standards for usability, deployment, applicability, or stability.”

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
partial
Assessed
58 d ago

Exploit prediction

0.12% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

Affected products

  • 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-190 Integer Overflow or Wraparound

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.