Out-of-bounds write in libheif - CVE-2026-84444

Vulnerability identifier: #VU145254

CSH Severity: Medium

CVSS v4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-84444

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause memory corruption.

The vulnerability exists due to out-of-bounds write in heif_context_add_image_tile() when encoding an ISO/IEC 23001-17 uncompressed tiled image with inconsistent component plane sizes. A remote attacker can supply a specially crafted heif_image tile with component planes larger than its declared dimensions to cause memory corruption.

Only builds with the experimental uncompressed codec enabled are affected.

libheif
Debian Linux
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
Desktop Applications Module
SUSE Package Hub 15
libheif (Debian package)
libheif-rav1e-debuginfo
libheif-ffmpeg
libheif-ffmpeg-debuginfo
gdk-pixbuf-loader-libheif
gdk-pixbuf-loader-libheif-debuginfo
libheif-devel
libheif1
libheif-aom-debuginfo
libheif-rav1e
libheif-jpeg-debuginfo
libheif-dav1d-debuginfo
libheif1-debuginfo
libheif-jpeg
libheif-debugsource
libheif-aom
libheif-dav1d

Install security update from vendor's website.

libheif - update to 1.23.2
libheif (Debian package) - update to 1.23.4-1~deb13u1
libheif-rav1e-debuginfo - update to 1.23.4-150700.3.21.1
libheif-ffmpeg - update to 1.23.4-150700.3.21.1
libheif-ffmpeg-debuginfo - update to 1.23.4-150700.3.21.1
gdk-pixbuf-loader-libheif - update to 1.23.4-150700.3.21.1
gdk-pixbuf-loader-libheif-debuginfo - update to 1.23.4-150700.3.21.1
libheif-devel - update to 1.23.4-150700.3.21.1
libheif1 - update to 1.23.4-150700.3.21.1
libheif-aom-debuginfo - update to 1.23.4-150700.3.21.1
libheif-rav1e - update to 1.23.4-150700.3.21.1
libheif-jpeg-debuginfo - update to 1.23.4-150700.3.21.1
libheif-dav1d-debuginfo - update to 1.23.4-150700.3.21.1
libheif1-debuginfo - update to 1.23.4-150700.3.21.1
libheif-jpeg - update to 1.23.4-150700.3.21.1
libheif-debugsource - update to 1.23.4-150700.3.21.1
libheif-aom - update to 1.23.4-150700.3.21.1
libheif-dav1d - update to 1.23.4-150700.3.21.1

• https://github.com/strukturag/libheif/security/advisories/GHSA-j264-xvrp-5v7q

• Multiple vulnerabilities in libheif
• Debian update for libheif
• SUSE update for libheif