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Ubuntu 26.04 LTS libheif Critical Denial of Service CVE-2026-47178

ubuntu
Calendar Grey June 29, 2026
Dist Ubuntu Esm H88
Several issues fixed in libheif on Ubuntu, addressing denial of service and code execution risks.
Several security issues were fixed in libheif.

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:

It was discovered that libheif incorrectly handled certain crafted HEIF

files. An attacker could possibly use this issue to cause a denial of

service or execute arbitrary code. (CVE-2026-47178)

It was discovered that libheif incorrectly validated offsets when

decoding certain crafted HEIF files. An attacker could possibly use this

issue to cause a denial of service. This issue only affected Ubuntu 26.04

LTS. (CVE-2026-49271)

Topics%20covered

Topics Covered

security advisory denial of service remote code execution package update Ubuntu libheif

Update Instructions

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

Ubuntu 26.04 LTS
  heif-gdk-pixbuf                 1.21.2-3ubuntu0.2
  heif-thumbnailer                1.21.2-3ubuntu0.2
  heif-view                       1.21.2-3ubuntu0.2
  libheif-dev                     1.21.2-3ubuntu0.2
  libheif-plugin-aomdec           1.21.2-3ubuntu0.2
  libheif-plugin-aomenc           1.21.2-3ubuntu0.2
  libheif-plugin-dav1d            1.21.2-3ubuntu0.2
  libheif-plugin-ffmpegdec        1.21.2-3ubuntu0.2
  libheif-plugin-j2kdec           1.21.2-3ubuntu0.2
  libheif-plugin-j2kenc           1.21.2-3ubuntu0.2
  libheif-plugin-jpegdec          1.21.2-3ubuntu0.2
  libheif-plugin-jpegenc          1.21.2-3ubuntu0.2
  libheif-plugin-kvazaar          1.21.2-3ubuntu0.2
  libheif-plugin-libde265         1.21.2-3ubuntu0.2
  libheif-plugin-rav1e            1.21.2-3ubuntu0.2
  libheif-plugin-svtenc           1.21.2-3ubuntu0.2
  libheif-plugin-x265             1.21.2-3ubuntu0.2
  libheif-plugins-all             1.21.2-3ubuntu0.2
  libheif1                        1.21.2-3ubuntu0.2

Ubuntu 25.10
  heif-gdk-pixbuf                 1.20.2-1ubuntu0.5
  heif-thumbnailer                1.20.2-1ubuntu0.5
  heif-view                       1.20.2-1ubuntu0.5
  libheif-dev                     1.20.2-1ubuntu0.5
  libheif-plugin-aomdec           1.20.2-1ubuntu0.5
  libheif-plugin-aomenc           1.20.2-1ubuntu0.5
  libheif-plugin-dav1d            1.20.2-1ubuntu0.5
  libheif-plugin-ffmpegdec        1.20.2-1ubuntu0.5
  libheif-plugin-j2kdec           1.20.2-1ubuntu0.5
  libheif-plugin-j2kenc           1.20.2-1ubuntu0.5
  libheif-plugin-jpegdec          1.20.2-1ubuntu0.5
  libheif-plugin-jpegenc          1.20.2-1ubuntu0.5
  libheif-plugin-kvazaar          1.20.2-1ubuntu0.5
  libheif-plugin-libde265         1.20.2-1ubuntu0.5
  libheif-plugin-rav1e            1.20.2-1ubuntu0.5
  libheif-plugin-svtenc           1.20.2-1ubuntu0.5
  libheif-plugin-x265             1.20.2-1ubuntu0.5
  libheif-plugins-all             1.20.2-1ubuntu0.5
  libheif1                        1.20.2-1ubuntu0.5

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

References

https://ubuntu.com/security/notices/USN-8479-1

CVE-2026-47178, CVE-2026-49271

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8479-1

Topics%20covered

Topics Covered

security advisory denial of service remote code execution package update Ubuntu libheif

Package Information

https://launchpad.net/ubuntu/+source/libheif/1.21.2-3ubuntu0.2
https://launchpad.net/ubuntu/+source/libheif/1.20.2-1ubuntu0.5

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