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[USN-8526-1] libheif vulnerabilities

Posted on 09 July 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8526-1
July 09, 2026

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

- Ubuntu 26.04 LTS
- Ubuntu 25.10

Summary:

Several security issues were fixed in libheif.

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

Details:

Xianrui Dong discovered that libheif had an out-of-bounds read in its
HEIF sequence track parser. An attacker could possibly use this issue
to cause a denial of service or obtain sensitive information. This issue
only affected Ubuntu 26.04 LTS. (CVE-2026-47254)

Junyi Liu discovered that libheif had a null pointer dereference in its
image tiling interface. An attacker could possibly use this issue to
cause a denial of service. (CVE-2026-47709)

Calvin Young and Enoch Chow discovered that libheif had an integer
overflow in its inline mask size calculation. An attacker could
possibly use this issue to cause a denial of service or obtain sensitive
information. (CVE-2026-47714)

Ariel Koren discovered that libheif had an integer underflow in its
grid image tile coordinate transform. An attacker could possibly use
this issue to cause a denial of service or obtain sensitive information.
(CVE-2026-48029)

It was discovered that libheif had a missing bound check in its HEIF
sequence parser, allowing unbounded heap allocation. An attacker could
possibly use this issue to cause a denial of service. (CVE-2026-50142)

Update instructions:

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

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

Ubuntu 25.10
heif-gdk-pixbuf 1.20.2-1ubuntu0.6
heif-thumbnailer 1.20.2-1ubuntu0.6
heif-view 1.20.2-1ubuntu0.6
libheif-dev 1.20.2-1ubuntu0.6
libheif-examples 1.20.2-1ubuntu0.6
libheif-plugin-aomdec 1.20.2-1ubuntu0.6
libheif-plugin-aomenc 1.20.2-1ubuntu0.6
libheif-plugin-dav1d 1.20.2-1ubuntu0.6
libheif-plugin-ffmpegdec 1.20.2-1ubuntu0.6
libheif-plugin-j2kdec 1.20.2-1ubuntu0.6
libheif-plugin-j2kenc 1.20.2-1ubuntu0.6
libheif-plugin-jpegdec 1.20.2-1ubuntu0.6
libheif-plugin-jpegenc 1.20.2-1ubuntu0.6
libheif-plugin-kvazaar 1.20.2-1ubuntu0.6
libheif-plugin-libde265 1.20.2-1ubuntu0.6
libheif-plugin-rav1e 1.20.2-1ubuntu0.6
libheif-plugin-svtenc 1.20.2-1ubuntu0.6
libheif-plugin-x265 1.20.2-1ubuntu0.6
libheif-plugins-all 1.20.2-1ubuntu0.6
libheif1 1.20.2-1ubuntu0.6

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

References:
https://ubuntu.com/security/notices/USN-8526-1
CVE-2026-47254, CVE-2026-47709, CVE-2026-47714, CVE-2026-48029,
CVE-2026-50142

Package Information:
https://launchpad.net/ubuntu/+source/libheif/1.21.2-3ubuntu0.3
https://launchpad.net/ubuntu/+source/libheif/1.20.2-1ubuntu0.6

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