Bug 2505100 (CVE-2026-47251) - CVE-2026-47251 libheif: libheif: Denial of Service and information disclosure via crafted HEIF file
Summary: CVE-2026-47251 libheif: libheif: Denial of Service and information disclosure...
Keywords:
Status: NEW
Alias: CVE-2026-47251
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2506067 2506068
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-21 22:17 UTC by OSIDB Bzimport
Modified: 2026-07-22 11:30 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-07-21 22:17:49 UTC 
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.
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