Out-of-bounds read in libheif - CVE-2026-84448

Vulnerability identifier: #VU145256

CSH Severity: Low

CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-84448

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to disclose sensitive information and cause a denial of service.

The vulnerability exists due to out-of-bounds read in heif_region_get_inline_mask_image() and the inline-mask region writer API when processing caller-supplied inline mask geometry and buffer lengths. A remote attacker can supply an undersized mask buffer with crafted width and height values to disclose sensitive information and cause a denial of service.

The issue is confined to the public writer API and is not reachable through the file-parsing path.

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
Ubuntu
libheif (Ubuntu package)
libheif (Debian package)
libheif-ffmpeg
libheif-ffmpeg-debuginfo
gdk-pixbuf-loader-libheif
gdk-pixbuf-loader-libheif-debuginfo
libheif-devel
libheif1
libheif-aom-debuginfo
libheif-rav1e
libheif-rav1e-debuginfo
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 (Ubuntu package) - addressed in versions 1.1.0-2ubuntu0.1~esm5, 1.6.1-1ubuntu0.1~esm5, 1.12.0-2ubuntu0.1~esm5, 1.17.6-1ubuntu4.9, 1.21.2-3ubuntu0.6
libheif (Debian package) - update to 1.23.4-1~deb13u1
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-rav1e-debuginfo - 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-p58j-h3vm-3fp5

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