CVE-2026-47251 libheif has an incomplete fix for CVE-2026-3949: integer overflow bypass in vvdec_push_data2

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...

CVE-2026-47251 libheif has an incomplete fix for CVE-2026-3949: integer overflow bypass in vvdec_push_data2

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...

graphicsmagick:coder_HEIF_fuzzer: Heap-buffer-overflow in vvdec_push_data2

Project: http://hg.code.sf.net/p/graphicsmagick/code Detailed Report: https://oss-fuzz.com/testcase?key=5932941304987648 Project: graphicsmagick Fuzzing Engine: honggfuzz Fuzz Target: coderHEIFfuzzer Job Type: honggfuzzasangraphicsmagick Platform Id: linux Crash Type: Heap-buffer-overflow READ 1...

CVE-2026-3949

A flaw was found in libheif. This vulnerability allows a local attacker to trigger an out-of-bounds read by manipulating the size argument in the vvdecpushdata2 function. This could lead to a denial of service DoS...

CVE-2026-3949

A vulnerability was determined in strukturag libheif up to 1.21.2. This affects the function vvdecpushdata2 of the file libheif/plugins/decodervvdec.cc of the component HEIF File Parser. Executing a manipulation of the argument size can lead to out-of-bounds read. The attack needs to be launched...

CVE-2026-3949: Out-of-bounds Read

A vulnerability was determined in strukturag libheif up to 1.21.2. This affects the function vvdecpushdata2 of the file libheif/plugins/decodervvdec.cc of the component HEIF File Parser. Executing a manipulation of the argument size can lead to out-of-bounds read. The attack needs to be launched...