CVE-2026-96611

FFmpeg before 9.0 has a signed integer overflow in libavformat/mov.c. In mov_read_ispe(), uint32_t width/height values from a crafted HEIF ispe box are stored into signed int fields without bounds checking, allowing values exceeding INT_MAX to become negative. In read_image_grid(), accumulating these values causes signed integer overflow (undefined behavior per C17 section 6.5), which on x86 wraps to a small positive value, bypassing downstream validity checks.

CVSS v3 6.9 MEDIUM

6.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.4 / Impact : 5.5

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/059eb2e853c1f62b8df1b73be9318061a7a21b0b	Patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23455	Issue Tracking Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*

History

15 Oct 2026, 19:43

Type	Values Removed	Values Added
CPE		cpe:2.3:a:ffmpeg:ffmpeg::::::::
References	~~() https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/059eb2e853c1f62b8df1b73be9318061a7a21b0b -~~	() https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/059eb2e853c1f62b8df1b73be9318061a7a21b0b - Patch
References	~~() https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23455 -~~	() https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23455 - Issue Tracking, Patch
First Time		Ffmpeg Ffmpeg ffmpeg

23 Sep 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-23 15:17

Updated : 2026-10-15 19:43

NVD link : CVE-2026-96611

Mitre link : CVE-2026-96611

CVE.ORG link : CVE-2026-96611

JSON object : View

Products Affected

ffmpeg

ffmpeg

CWE

CWE-190

Integer Overflow or Wraparound

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