CVE-2026-84444 libheif uncompressed tiled image encoding allows out-of-bounds write

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, when WITHUNCOMPRESSEDCODEC is enabled, heifcontextaddimagetile accepts an independently constructed tile whose component-plane dimensions do not match the tile geometry established by the prototype image...

CVE-2026-84444 libheif uncompressed tiled image encoding allows out-of-bounds write

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, when WITHUNCOMPRESSEDCODEC is enabled, heifcontextaddimagetile accepts an independently constructed tile whose component-plane dimensions do not match the tile geometry established by the prototype image...

CVE-2026-84383

libheif, a HEIF and AVIF decoder/encoder, is affected by a heap out-of-bounds write (CVSS 9.8 Critical) in versions 1.22.0 through 1.23.2. A crafted item graph using nested iden and auxl references causes scale_nearest_neighbor() to write 16-bit samples into an 8-bit Alpha plane allocation, with ...

CVE-2026-84383 libheif: Heap buffer overflow in `scale_nearest_neighbor()` via duplicate Alpha planes from nested `iden`/`auxl` items

libheif is a HEIF and AVIF file format decoder and encoder. From 1.22.0 until 1.23.2, a crafted HEIF, HEIC, or AVIF item graph using nested iden and auxl references can make HeifPixelImage::transferchannelfromimageas append duplicate Alpha planes with different bit depths to mstorage...

CVE-2026-84383 libheif: Heap buffer overflow in `scale_nearest_neighbor()` via duplicate Alpha planes from nested `iden`/`auxl` items

libheif is a HEIF and AVIF file format decoder and encoder. From 1.22.0 until 1.23.2, a crafted HEIF, HEIC, or AVIF item graph using nested iden and auxl references can make HeifPixelImage::transferchannelfromimageas append duplicate Alpha planes with different bit depths to mstorage...

EUVD-2026-83019

libheif is a HEIF and AVIF file format decoder and encoder. From 1.22.0 until 1.23.2, a crafted HEIF, HEIC, or AVIF item graph using nested iden and auxl references can make HeifPixelImage::transferchannelfromimageas append duplicate Alpha planes with different bit depths to mstorage...

CVE-2026-84383 libheif: Heap buffer overflow in `scale_nearest_neighbor()` via duplicate Alpha planes from nested `iden`/`auxl` items

libheif is a HEIF and AVIF file format decoder and encoder. From 1.22.0 until 1.23.2, a crafted HEIF, HEIC, or AVIF item graph using nested iden and auxl references can make HeifPixelImage::transferchannelfromimageas append duplicate Alpha planes with different bit depths to mstorage...

EUVD-2026-83017

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, crafted HEIF sequence timing and edit-list data can make Track::initsampletimingtable compute a logical mnumoutputsamples value that exceeds the uint32t counters used by TrackVisual::decodenextimagesample and...

CVE-2026-84446 libheif: Sequence decode timing-table initialization allows non-terminating loops and unbounded memory, bypassing max_sequence_frames

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, crafted HEIF sequence timing and edit-list data can make Track::initsampletimingtable compute a logical mnumoutputsamples value that exceeds the uint32t counters used by TrackVisual::decodenextimagesample and...

CVE-2026-84446

libheif (a HEIF and AVIF file format decoder/encoder) prior to version 1.23.2 is vulnerable to a denial-of-service via crafted HEIF sequence timing and edit-list data. The root cause is that Track::init_sample_timing_table() computes an m_num_output_samples value exceeding the uint32_t counters u...

CVE-2026-84446 libheif: Sequence decode timing-table initialization allows non-terminating loops and unbounded memory, bypassing max_sequence_frames

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, crafted HEIF sequence timing and edit-list data can make Track::initsampletimingtable compute a logical mnumoutputsamples value that exceeds the uint32t counters used by TrackVisual::decodenextimagesample and...

CVE-2026-84446

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, crafted HEIF sequence timing and edit-list data can make Track::initsampletimingtable compute a logical mnumoutputsamples value that exceeds the uint32t counters used by TrackVisual::decodenextimagesample and...

CVE-2026-84446 libheif: Sequence decode timing-table initialization allows non-terminating loops and unbounded memory, bypassing max_sequence_frames

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, crafted HEIF sequence timing and edit-list data can make Track::initsampletimingtable compute a logical mnumoutputsamples value that exceeds the uint32t counters used by TrackVisual::decodenextimagesample and...

CVE-2026-84448

libheif , a HEIF and AVIF file format decoder/encoder, contains a heap out-of-bounds read in its region writer API prior to version 1.23.2 . The function heif_region_item_add_region_inline_mask_data() in heif_regions.cc accepts a mask_data_len parameter without verifying it matches the byte count...

CVE-2026-84448 libheif: Heap out-of-bounds read in libheif inline-mask region API (heif_region_item_add_region_inline_mask_data / heif_region_get_mask_image)

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, the public heifregionitemaddregioninlinemaskdata function in libheif/api/libheif/heifregions.cc accepts maskdatalen without verifying that it equals the byte count required by width and height. A later...

EUVD-2026-83015

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, the public heifregionitemaddregioninlinemaskdata function in libheif/api/libheif/heifregions.cc accepts maskdatalen without verifying that it equals the byte count required by width and height. A later...

CVE-2026-84448 libheif: Heap out-of-bounds read in libheif inline-mask region API (heif_region_item_add_region_inline_mask_data / heif_region_get_mask_image)

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, the public heifregionitemaddregioninlinemaskdata function in libheif/api/libheif/heifregions.cc accepts maskdatalen without verifying that it equals the byte count required by width and height. A later...

CVE-2026-84448

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, the public heifregionitemaddregioninlinemaskdata function in libheif/api/libheif/heifregions.cc accepts maskdatalen without verifying that it equals the byte count required by width and height. A later...

CVE-2026-84444: Out-of-bounds Write

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, when WITHUNCOMPRESSEDCODEC is enabled, heifcontextaddimagetile accepts an independently constructed tile whose component-plane dimensions do not match the tile geometry established by the prototype image...

CVE-2026-84450: Reachable Assertion

libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.3, a crafted image item containing a clap property and an ispe width or height greater than INT32MAX + 1 can reach crop calculations through heifimagehandlegetimagetiling. Boxclap::leftrounded or Boxclap::toprounde...