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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. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1712) introduced an integer overflow in the very security check it added. The check itself can be bypassed, allowing a crafted HEIF file with a VVC track to trigger the same out-of-bounds heap read that CVE-2026-3949 was meant to prevent. This is a separate, currently-unpatched vulnerability. Issue #1712 was closed as fixed without testing the edge case where `size` is near `UINT32_MAX`. Version 1.22.0 patches the issue.
FEDORA-2026-26ae66c60f (darktable-5.4.1-12.fc45, digikam-9.1.0-3.fc45, and 25 more) has been submitted as an update to Fedora 45. https://bodhi.fedoraproject.org/updates/FEDORA-2026-26ae66c60f
FEDORA-2026-823e06dfcf (darktable-5.4.1-12.fc45, digikam-9.1.0-3.fc45, and 25 more) has been submitted as an update to Fedora 45. https://bodhi.fedoraproject.org/updates/FEDORA-2026-823e06dfcf
FEDORA-2026-b8ff7153f1 (darktable-5.4.1-12.fc46, digikam-9.1.0-3.fc46, and 25 more) has been submitted as an update to Fedora 46. https://bodhi.fedoraproject.org/updates/FEDORA-2026-b8ff7153f1
FEDORA-2026-823e06dfcf (darktable-5.4.1-12.fc45, digikam-9.1.0-3.fc45, and 25 more) has been pushed to the Fedora 45 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2026-b8ff7153f1 (darktable-5.4.1-12.fc46, digikam-9.1.0-3.fc46, and 25 more) has been pushed to the Fedora 46 stable repository. If problem still persists, please make note of it in this bug report.
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle. Changing version to 45.
FEDORA-2026-a7307e699c (libheif-1.23.3-2.fc45) has been submitted as an update to Fedora 45. https://bodhi.fedoraproject.org/updates/FEDORA-2026-a7307e699c