CVE-2026-18393 MEDIUM

CVE-2026-18393: Ffmpeg: ffmpeg: heap buffer overflow in tdsc_load_cursor() via cur_fmt_mono cursor

Vendor Red Hat
Product Red Hat Enterprise Linux AI (RHEL AI) 3
Weakness CWE-787
Published August 28, 2026
Last update August 28, 2026
View on NVD All CVEs

CVSS base score

5.4/10
Attack vector Adjacent
Attack complexity High
Privileges required None
User interaction Required
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 28, 2026 CVE published
August 28, 2026 Record updated