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.
Metrics
Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
Update to FFmpeg commit 059eb2e853 or later.
Workaround
No workaround given by the vendor.
References
History
Wed, 23 Sep 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| First Time appeared |
Ffmpeg
Ffmpeg ffmpeg |
|
| Weaknesses | CWE-190 | |
| CPEs | cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Ffmpeg
Ffmpeg ffmpeg |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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MITRE
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-09-23T14:18:54.929Z
Reserved: 2026-09-23T14:18:54.578Z
Link: CVE-2026-96611
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-23T15:17:34.160
Modified: 2026-09-23T15:17:34.160
Link: CVE-2026-96611
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses