CVE-2026-18393

Published: Aug 28, 2026Modified: Aug 28, 2026

5.4

Vector

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

Exploitability: 1.2 / Impact: 4.2

Source: secalert@redhat.com (Secondary)

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.

Related CWEs

CWE-787

Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

References (4)

https://access.redhat.com/security/cve/CVE-2026-18393

Source: secalert@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2520309

Source: secalert@redhat.com

https://github.com/FFmpeg/FFmpeg/commit/242ff799c75f20bade946314c8d741d0887ee11c

Source: secalert@redhat.com

https://patchwork.ffmpeg.org/project/ffmpeg/patch/177767065817.63.1948165304485903849@29965ddac10e/

Source: secalert@redhat.com

Timeline

No history available yet.