← CVE Intelligence

CVE-2026-84384

libheif: brotli/zlib decompression paths lack output-size limits, allowing decompression-bomb OOM/DoS PUBLISHED

Description (CNA)

libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.2, crafted HEIF or AVIF mime metadata and unci image data can cause decompress_brotli() and do_inflate() to grow accumulated output without an effective size limit or MemoryHandle accounting. The brotli path has no output bound, while the zlib path checks only a small temporary buffer in a branch that valid streams do not reach, and overlapping icef units can decompress the same payload repeatedly. HeifContext::interpret_heif_file_images() processes multiple compressed metadata items during file opening, allowing a small file to consume unbounded memory and terminate the process. This issue is fixed in version 1.23.2.

Affected (CNA)

Vendor / productVersions
strukturag / libheifaffected >= 1.19.0, < 1.23.2

CWE

CWE-409

References

ADP enrichment

CISA-ADP

No English description supplied.