CVE-2026-88914
Publication date 11 September 2026
Last updated 1 October 2026
Ubuntu priority
Description
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| gst-plugins-good1.0 | 26.04 LTS resolute |
Fixed 1.28.2-2ubuntu0.4
|
| 24.04 LTS noble |
Fixed 1.24.2-1ubuntu1.8
|
|
| 22.04 LTS jammy |
Fixed 1.20.3-0ubuntu1.10
|
|
| 20.04 LTS focal |
Fixed 1.16.3-0ubuntu1.3+esm4
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
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CVSS version: CVSS v3.0
Base score
4.4 · Medium
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
References
Related Ubuntu Security Notices (USN)
- USN-8863-1
- GStreamer Good Plugins vulnerabilities
- 1 October 2026
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-88914
- https://gstreamer.freedesktop.org/security/sa-2026-0079.html
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5235
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12433
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12437
- https://access.redhat.com/security/cve/CVE-2026-88914
- https://bugzilla.redhat.com/show_bug.cgi?id=2531416