CVE-2026-47251
6.8
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| strukturag | libheif | < 1.22.0 | affected |
Weaknesses
- CWE-125: CWE-125: Out-of-bounds Read
- CWE-190: CWE-190: Integer Overflow or Wraparound
References
- https://github.com/strukturag/libheif/security/advisories/GHSA-p6q9-fhf2-vj9v
- https://github.com/strukturag/libheif/issues/1712
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