Bug 2519179 (CVE-2026-62292)

Summary: CVE-2026-62292 libheif: libheif: Denial of service via crafted HEIF image processing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in libheif, a HEIF and AVIF file format decoder and encoder. A remote attacker could craft a malicious HEIF image that, when processed by an application decoding an advertised tile, could lead to an out-of-bounds read. This vulnerability occurs due to an integer overflow during tile offset computation, which bypasses a bounds check and results in an invalid memory access. Successful exploitation causes the application to crash, leading to a denial of service.
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Bug Depends On: 2521918, 2521919    
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Description OSIDB Bzimport 2026-08-18 22:15:53 UTC 
libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.1, a crafted uncompressed HEIF image using generic zlib unci full-item compression can crash an application that decodes an advertised tile with heif_image_handle_decode_image_tile(). In libheif/codecs/uncompressed/unc_decoder.cc, unc_decoder::fetch_tile_data() computes a large tile offset and unc_decoder::get_compressed_image_data_uncompressed() validates it with range_start_offset plus range_size. For the last advertised tile (4095, 4095), the addition can wrap to zero, bypass the bounds check, and pass an invalid source pointer and a one-terabyte length to memcpy. The observed result is an out-of-bounds read and process crash; opening the file alone does not trigger the issue because tile decoding is required. This issue is fixed in version 1.23.1.