Skip to content
OpenAdvisories
High · 7.5 CVE-2026-84384 EUVD-2026-83022

libheif: brotli/zlib decompression paths lack output-size limits, allowing decompression-bomb OOM/DoS

Published Sep 18, 2026 · Updated Sep 18, 2026 · Assigned by GitHub_M

Description

libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.2, crafted HEIF or AVIF mime metadata and unci image data can cause decompress_brotli() and do_inflate() to grow accumulated output without an effective size limit or MemoryHandle accounting. The brotli path has no output bound, while the zlib path checks only a small temporary buffer in a branch that valid streams do not reach, and overlapping icef units can decompress the same payload repeatedly. HeifContext::interpret_heif_file_images() processes multiple compressed metadata items during file opening, allowing a small file to consume unbounded memory and terminate the process. This issue is fixed in version 1.23.2.

Affected products

VendorProductAffectedFixed
strukturag libheif >= 1.19.0, < 1.23.2 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 libheif 1.23.2-1 —
Debian 13 libheif 1.23.4-1~deb13u1 —
Debian 12 libheif No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 26.04 LTS libheif 1.21.2-3ubuntu0.6 USN-8846-1
Ubuntu 24.04 LTS libheif 1.17.6-1ubuntu4.9 USN-8846-1
Show 3 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 22.04 LTS libheif 1.12.0-2ubuntu0.1~esm5 USN-8846-1
Ubuntu Pro 20.04 LTS libheif 1.6.1-1ubuntu0.1~esm5 USN-8846-1
Ubuntu Pro 18.04 LTS libheif 1.1.0-2ubuntu0.1~esm5 USN-8846-1
ReleasePackageFixed inAdvisory
SLES 15 SP7 libheif 1.23.4-150700.3.21.1 SUSE-SU-2026:4276-1
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed libheif 1.23.4-1.1 openSUSE-SU-2026:11719-1
openSUSE Leap 16.0 libheif 1.23.4-160000.1.1 openSUSE-SU-2026:21889-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 libheif +3 1.23.6-1.amzn2023 ALAS2023-2026-3314

Advisories 5

References