CVE-2026-18393
Publication date 31 August 2026
Last updated 31 August 2026
Ubuntu priority
Description
A flaw was found in FFmpeg. The tdsc_load_cursor() function writes beyond the bounds of a heap-allocated buffer when processing crafted TDSC cursor data. A remote attacker could exploit this by supplying a specially crafted video file, potentially leading to a denial of service or arbitrary code execution.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| ffmpeg | 26.04 LTS resolute |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| libav | 26.04 LTS resolute | Not in release |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 14.04 LTS trusty |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
5.4 · Medium
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-18393
- https://access.redhat.com/security/cve/CVE-2026-18393
- https://bugzilla.redhat.com/show_bug.cgi?id=2520309
- https://github.com/FFmpeg/FFmpeg/commit/242ff799c75f20bade946314c8d741d0887ee11c
- https://patchwork.ffmpeg.org/project/ffmpeg/patch/177767065817.63.1948165304485903849@29965ddac10e/