CVE-2026-96611
Last modified
CVE-2026-96611 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.11% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ffmpeg | Ffmpeg | < 9.0 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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