Ubuntu libheif Important Denial of Service Vulnerabilities USN-8649

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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 had an integer underflow in the Fraction constructor when a clap transform was applied twice. An attacker could possibly use this issue to cause libheif to crash, resulting in a denial of service. (CVE-2026-62289) It was discovered that libheif had an out-of-bounds read in uncompressed tile range slicing. An attacker could possibly use this issue to cause libheif to crash, resulting in a denial of service. This issue only affected Ubuntu 25.10. (CVE-2026-62292)

Several security issues were fixed in libheif.

Software Description:

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

It was discovered that libheif had an integer underflow in the Fraction

constructor when a clap transform was applied twice. An attacker could

possibly use this issue to cause libheif to crash, resulting in a denial of

service. (CVE-2026-62289)

It was discovered that libheif had an out-of-bounds read in uncompressed

tile range slicing. An attacker could possibly use this issue to cause

libheif to crash, resulting in a denial of service. This issue only

affected Ubuntu 25.10. (CVE-2026-62292)

The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS heif-gdk-pixbuf 1.21.2-3ubuntu0.4 heif-thumbnailer 1.21.2-3ubuntu0.4 heif-view 1.21.2-3ubuntu0.4 libheif-plugin-aomdec 1.21.2-3ubuntu0.4 libheif-plugin-aomenc 1.21.2-3ubuntu0.4 libheif-plugin-dav1d 1.21.2-3ubuntu0.4 libheif-plugin-ffmpegdec 1.21.2-3ubuntu0.4 libheif-plugin-j2kdec 1.21.2-3ubuntu0.4 libheif-plugin-j2kenc 1.21.2-3ubuntu0.4 libheif-plugin-jpegdec 1.21.2-3ubuntu0.4 libheif-plugin-jpegenc 1.21.2-3ubuntu0.4 libheif-plugin-kvazaar 1.21.2-3ubuntu0.4 libheif-plugin-libde265 1.21.2-3ubuntu0.4 libheif-plugin-rav1e 1.21.2-3ubuntu0.4 libheif-plugin-svtenc 1.21.2-3ubuntu0.4 libheif-plugin-x265 1.21.2-3ubuntu0.4 libheif-plugins-all 1.21.2-3ubuntu0.4 libheif1 1.21.2-3ubuntu0.4 Ubuntu 24.04 LTS heif-gdk-pixbuf 1.17.6-1ubuntu4.7 heif-thumbnailer 1.17.6-1ubuntu4.7 libheif-plugin-aomdec 1.17.6-1ubuntu4.7 libheif-plugin-aomenc 1.17.6-1ubuntu4.7 libheif-plugin-dav1d 1.17.6-1ubuntu4.7 libheif-plugin-ffmpegdec 1.17.6-1ubuntu4.7 libheif-plugin-j2kdec 1.17.6-1ubuntu4.7 libheif-plugin-j2kenc 1.17.6-1ubuntu4.7 libheif-plugin-jpegdec 1.17.6-1ubuntu4.7 libheif-plugin-jpegenc 1.17.6-1ubuntu4.7 libheif-plugin-libde265 1.17.6-1ubuntu4.7 libheif-plugin-rav1e 1.17.6-1ubuntu4.7 libheif-plugin-svtenc 1.17.6-1ubuntu4.7 libheif-plugin-x265 1.17.6-1ubuntu4.7 libheif1 1.17.6-1ubuntu4.7 In general, a standard system update will make all the necessary changes.

CVE-2026-62289, CVE-2026-62292

Ubuntu Security Notice USN-8649-1

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