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

CVE-2026-47251 affects libheif. The description reports that the fix for CVE-2026-3949 introduced an integer overflow check that can be bypassed, allowing a crafted HEIF file with a VVC track to trigger the same out-of-bounds heap read as CVE-2026-3949. This is described as a separate, currently-...

Low: libheif

Issue Overview: 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...

Out-of-bounds Read

Overview Affected versions of this package are vulnerable to Out-of-bounds Read in the vvdecpushdata2 function of the HEIF File Parser component. An attacker can cause an out-of-bounds read by manipulating the size argument during local exploitation. Remediation Upgrade libheif to version 1.23.1 ...

DEBIAN-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 strukturag libheif HEIF File decoder_vvdec.cc vvdec_push_data2 out-of-bounds

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...