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Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process. libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted HEIF or AVIF file containing a clean aperture box can reduce an image dimension to zero and crash or corrupt tiling results when heif_image_handle_get_image_tiling(handle, 1, &tiling) is called. ImageItem::get_heif_image_tiling() returns already transformed dimensions, and process_image_transformations_on_tiling() applies the clean aperture transformation again. The second application passes zero to Box_clap::left_rounded(0), where image_width minus one underflows and constructs Fraction(0xFFFFFFFF, 2). Debug builds reach an assertion and abort, while release builds can return a corrupt crop and zero-width tiling result. The affected implementation spans libheif/image-items/image_item.cc, libheif/context.cc, and libheif/box.cc. This issue is fixed in version 1.23.1.
FEDORA-EPEL-2026-0d891ec3ad (aom-3.13.3-1.el10_3 and libheif-1.23.5-3.el10_3) has been submitted as an update to Fedora EPEL 10.3. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-0d891ec3ad
FEDORA-EPEL-2026-0d891ec3ad has been pushed to the Fedora EPEL 10.3 testing repository. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-0d891ec3ad See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-EPEL-2026-18d39b7b8d has been pushed to the Fedora EPEL 10.4 testing repository. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-18d39b7b8d See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
This package has changed maintainer in Fedora. Reassigning to the new maintainer of this component.
FEDORA-EPEL-2026-18d39b7b8d (aom-3.13.3-1.el10_4 and libheif-1.23.5-4.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-EPEL-2026-0d891ec3ad (aom-3.13.3-1.el10_3 and libheif-1.23.5-4.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository. If problem still persists, please make note of it in this bug report.