CVE-2026-51807
Description
Heap-based out-of-bounds write in j2k_precinct_subband::parse_packet_header() in OpenHTJ2K versions 0.18.3 and earlier (fixed in v0.18.4) caused by missing bounds validation before coding-pass lengths are written to j2k_codeblock::pass_length[128]. A crafted JPEG 2000 codestream containing malformed PPM packet headers can trigger a heap-based out-of-bounds write in j2k_precinct_subband::parse_packet_header() in source/core/coding/coding_units.cpp due to missing bounds validation for the j2k_codeblock::pass_length[128] array which can lead to heap corruption and process termination.
How to fix
- OpenHTJ2K0.18.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| OpenHTJ2K | v ≤ 0.18.3 | 0.18.4 |
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