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.
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Affected Vendors & Products
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History
Sat, 26 Sep 2026 23:30:00 +0000
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ssvc
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Thu, 24 Sep 2026 00:15:00 +0000
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| Title | Signed Integer Overflow in FFmpeg HEIF Parser Leading to Unsafe Integer Handling | ffmpeg: FFmpeg: Data corruption and information disclosure via signed integer overflow in HEIF processing |
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threat_severity
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threat_severity
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Wed, 23 Sep 2026 16:15:00 +0000
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| Title | Signed Integer Overflow in FFmpeg HEIF Parser Leading to Unsafe Integer Handling |
Wed, 23 Sep 2026 14:30:00 +0000
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| 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 |
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| Weaknesses | CWE-190 | |
| CPEs | cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Ffmpeg
Ffmpeg ffmpeg |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: mitre
Published: 2026-09-23T14:18:54.929Z
Updated: 2026-09-26T22:51:22.006Z
Reserved: 2026-09-23T14:18:54.578Z
Link: CVE-2026-96611
Updated: 2026-09-26T22:49:07.487Z
Status : Analyzed
Published: 2026-09-23T15:17:34.160
Modified: 2026-10-15T19:43:29.817
Link: CVE-2026-96611