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[USN-9012-1] libheif vulnerability

Posted on 10 November 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-9012-1
November 09, 2026

libheif vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS

Summary:

libheif could be made to crash or run programs as your login if it opened a
specially crafted file.

Software Description:
- libheif: An ISO/IEC 23008-12:2017 HEIF and AVIF file format decoder and encoder

Details:

Alex Thomas discovered that libheif incorrectly handled certain HEIF
images. An attacker could possibly use this issue to execute arbitrary code
if a user or automated system were tricked into opening a specially crafted
file.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
heif-gdk-pixbuf 1.21.2-3ubuntu0.7
heif-thumbnailer 1.21.2-3ubuntu0.7
heif-view 1.21.2-3ubuntu0.7
libheif-dev 1.21.2-3ubuntu0.7
libheif-examples 1.21.2-3ubuntu0.7
libheif-plugin-aomdec 1.21.2-3ubuntu0.7
libheif-plugin-aomenc 1.21.2-3ubuntu0.7
libheif-plugin-dav1d 1.21.2-3ubuntu0.7
libheif-plugin-ffmpegdec 1.21.2-3ubuntu0.7
libheif-plugin-j2kdec 1.21.2-3ubuntu0.7
libheif-plugin-j2kenc 1.21.2-3ubuntu0.7
libheif-plugin-jpegdec 1.21.2-3ubuntu0.7
libheif-plugin-jpegenc 1.21.2-3ubuntu0.7
libheif-plugin-kvazaar 1.21.2-3ubuntu0.7
libheif-plugin-libde265 1.21.2-3ubuntu0.7
libheif-plugin-rav1e 1.21.2-3ubuntu0.7
libheif-plugin-svtenc 1.21.2-3ubuntu0.7
libheif-plugin-x265 1.21.2-3ubuntu0.7
libheif-plugins-all 1.21.2-3ubuntu0.7
libheif1 1.21.2-3ubuntu0.7

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-9012-1
CVE-2026-120208

Package Information:
https://launchpad.net/ubuntu/+source/libheif/1.21.2-3ubuntu0.7

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