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CVE-2026-47714

libheif has integer overflow in inline mask size calculation that causes undersized buffer allocation PUBLISHED

Description (CNA)

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, the inline mask parsing code in `libheif/region.cc` contains an integer overflow. Both `width` and `height` are `unsigned int` (32-bit) values parsed from the HEIF file. Their product can exceed `UINT32_MAX`, wrapping to a small value before the division by 8. This causes an undersized buffer allocation, leading to out-of-bounds memory access when the mask data is later interpreted as a `width x height` bitmap. Version 1.22.0 patches the issue.

Affected (CNA)

Vendor / productVersions
strukturag / libheifaffected < 1.22.0

CWE

CWE-190

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.