libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.3, the no-icef full-item branch of unc_decoder::get_compressed_image_data_uncompressed() in libheif/codecs/uncompressed/unc_decoder.cc retains an addition-based range check that can wrap when a crafted uncompressed tile grid produces a large range_start_offset and range_size. The overflow makes the bounds comparison pass and allows heif_image_handle_decode_image_tile() to call memcpy() with an invalid source pointer and a very large length when decoding a valid high-index advertised tile. This incomplete remediation of CVE-2026-62292 can reliably crash tile-processing applications, while whole-image decoding is not claimed to reach the demonstrated path. This issue is fixed in version 1.23.3.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade libheifUpgrade libheif-toolsUpgrade heif-pixbuf-loader-debuginfoUpgrade libheif-develUpgrade heif-pixbuf-loaderUpgrade libheif-tools-debuginfoUpgrade libheif-debuginfoUpgrade libheif-debugsource | Sep 30, 2026 | Sep 18, 2026 |
| Debian | — | Upgrade libheif | Sep 30, 2026 | Sep 18, 2026 |
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