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.
CVE-2026-96611
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-96611
FFmpeg
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/FFmpeg/FFmpeg",
"vendor": "FFmpeg",
"modules": [
"libavformat"
],
"product": "FFmpeg",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "9.0",
"versionType": "custom"
}
],
"programFiles": [
"libavformat/mov.c"
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-96611
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #2419 · Revision 1
- Added to Heist Feed
- Publisher date