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bdu:2026-14478

BELL-CVE-2026-84383

Affected: Alpaquita:stream: libheif

EUVD-2026-371941

fkie_cve-2026-84383

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::transfer_channel_from_image_as() append duplicate Alpha planes with different bit depths to m_storage. HeifPixelImage::scale_nearest_neighbor() in libheif/image/pixelimage.cc allocates the destination Alpha plane using the first plane's 8-bit depth, then iterates a later 10-bit or 12-bit Alpha component and writes uint16_t samples into the same 8-bit allocation. The output geometry controls the overflow extent and the encoded sample values control the data written, allowing a remote file processed by heif_decode_image() to cause a heap out-of-bounds write. This issue is fixed in version 1.23.2.

openSUSE-SU-2026:11719-1 — gdk-pixbuf-loader-libheif-1.23.4-1.1 on GA media

gdk-pixbuf-loader-libheif-1.23.4-1.1 on GA media

Withdrawn: UBUNTU-CVE-2026-84383

Withdrawn by the publisher.

Affected: Ubuntu:Pro:18.04:LTS: libheif, Ubuntu:Pro:20.04:LTS: libheif, Ubuntu:Pro:22.04:LTS: libheif, Ubuntu:24.04:LTS: libheif, Ubuntu:26.04:LTS: libheif

[GHSA-g89c-p67h-r497: Heap buffer overflow in `scale_nearest_neighbor()` via duplicate Alpha planes from nested `iden`/`auxl` items]