CVE-2026-18393
Published:August 28, 2026
Updated:September 24, 2026
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.
Affected Packages
ffmpeg (CONAN):
Affected version(s) =8.1 <8.1.1Fix Suggestion:
Update to version 8.1.1ffmpeg (CONAN):
Affected version(s) >=7.1.1 <7.1.4Fix Suggestion:
Update to version 7.1.4https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) >=n8.0 <n8.0.2Fix Suggestion:
Update to version n8.0.2https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) =n8.1 <n8.1.1Fix Suggestion:
Update to version n8.1.1https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) >=n0.5.5 <n4.4.7Fix Suggestion:
Update to version n4.4.7https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) >=n5.1 <n5.1.9Fix Suggestion:
Update to version n5.1.9https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) >=n7.1 <n7.1.4Fix Suggestion:
Update to version n7.1.4https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) >=n6.1 <n6.1.5Fix Suggestion:
Update to version n6.1.5Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.9
Attack Vector
ADJACENT
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.4
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Write
EPSS
Base Score:
0.26