# CVE-2026-84449: libheif: libheif is a HEIF and AVIF file format decoder and encoder CVE-2026-84449 is fixed in 17 products on 1 platform, first by DEBIAN-CVE-2026-84449, released September 19, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-84449 - Priority: Routine - CVSS: 3.7 (low) - EPSS: 0.0042 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 18, 2026 ## Description libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.19.6, Op_RGB24_32_to_YCbCr::convert_colorspace() stores image-plane strides in an integer width that can overflow for extremely large RGB images created through heif_image_create() and heif_image_add_plane(). The resulting wrapped stride causes the conversion loop in libheif/color-conversion/rgb2yuv.cc to compute an invalid input pointer and read beyond the allocated interleaved plane while heif_context_encode_image() performs RGB-to-YCbCr conversion. This can crash the encoding process. This issue is fixed in version 1.19.6. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | heif-gdk-pixbuf Ubuntu 20.04 LTS (focal) | 1.6.1-1ubuntu0.1~esm5 | [heif-gdk-pixbuf 1.6.1-1ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-focal-heif-gdk-pixbuf-1.6.1-1ubuntu0.1-esm5.md) | Oct 2, 2026 | | Linux | heif-gdk-pixbuf Ubuntu 22.04.1 LTS (jammy) | 1.12.0-2ubuntu0.1~esm5 | [heif-gdk-pixbuf 1.12.0-2ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-heif-gdk-pixbuf-1.12.0-2ubuntu0.1-esm5.md) | Oct 2, 2026 | | Linux | heif-gdk-pixbuf Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [heif-gdk-pixbuf 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-heif-gdk-pixbuf-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | heif-thumbnailer Ubuntu 20.04 LTS (focal) | 1.6.1-1ubuntu0.1~esm5 | [heif-thumbnailer 1.6.1-1ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-focal-heif-thumbnailer-1.6.1-1ubuntu0.1-esm5.md) | Oct 2, 2026 | | Linux | heif-thumbnailer Ubuntu 22.04.1 LTS (jammy) | 1.12.0-2ubuntu0.1~esm5 | [heif-thumbnailer 1.12.0-2ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-heif-thumbnailer-1.12.0-2ubuntu0.1-esm5.md) | Oct 2, 2026 | | Linux | heif-thumbnailer Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [heif-thumbnailer 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-heif-thumbnailer-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif Debian 13.5 (trixie) | 1.19.7-1 | [DEBIAN-CVE-2026-84449](https://patchblox.com/security/data/fix/linux/debian-cve-2026-84449.md) | Sep 19, 2026 | | Linux | libheif Debian 14 | 1.19.7-1 | [DEBIAN-CVE-2026-84449](https://patchblox.com/security/data/fix/linux/debian-cve-2026-84449.md) | Sep 19, 2026 | | Linux | libheif opensuse-leap 16.0 | 1.23.5-160000.1.1 | [OPENSUSE-SU-2026:22052-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22052-1.md) | Nov 7, 2026 | | Linux | libheif sles 16.0 | 1.23.5-160000.1.1 | [SUSE-SU-2026:24205-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24205-1.md) | Nov 7, 2026 | | Linux | libheif-examples Ubuntu 18.04.6 LTS (bionic) | 1.1.0-2ubuntu0.1~esm5 | [libheif-examples 1.1.0-2ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libheif-examples-1.1.0-2ubuntu0.1-esm5.md) | Oct 2, 2026 | | Linux | libheif-examples Ubuntu 20.04 LTS (focal) | 1.6.1-1ubuntu0.1~esm5 | [libheif-examples 1.6.1-1ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libheif-examples-1.6.1-1ubuntu0.1-esm5.md) | Oct 2, 2026 | | Linux | libheif-examples Ubuntu 22.04.1 LTS (jammy) | 1.12.0-2ubuntu0.1~esm5 | [libheif-examples 1.12.0-2ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libheif-examples-1.12.0-2ubuntu0.1-esm5.md) | Oct 2, 2026 | | Linux | libheif-examples Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-examples 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-examples-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-aomdec Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-aomdec 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-aomdec-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-aomenc Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-aomenc 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-aomenc-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-dav1d Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-dav1d 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-dav1d-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-ffmpegdec Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-ffmpegdec 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-ffmpegdec-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-j2kdec Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-j2kdec 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-j2kdec-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-j2kenc Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-j2kenc 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-j2kenc-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-jpegdec Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-jpegdec 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-jpegdec-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-jpegenc Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-jpegenc 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-jpegenc-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-libde265 Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-libde265 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-libde265-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-rav1e Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-rav1e 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-rav1e-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-svtenc Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-svtenc 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-svtenc-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif-plugin-x265 Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif-plugin-x265 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif-plugin-x265-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | | Linux | libheif1 Ubuntu 18.04.6 LTS (bionic) | 1.1.0-2ubuntu0.1~esm5 | [libheif1 1.1.0-2ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libheif1-1.1.0-2ubuntu0.1-esm5.md) | Oct 2, 2026 | | Linux | libheif1 Ubuntu 20.04 LTS (focal) | 1.6.1-1ubuntu0.1~esm5 | [libheif1 1.6.1-1ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libheif1-1.6.1-1ubuntu0.1-esm5.md) | Oct 2, 2026 | | Linux | libheif1 Ubuntu 22.04.1 LTS (jammy) | 1.12.0-2ubuntu0.1~esm5 | [libheif1 1.12.0-2ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libheif1-1.12.0-2ubuntu0.1-esm5.md) | Oct 2, 2026 | | Linux | libheif1 Ubuntu 24.04.5 LTS (noble) | 1.17.6-1ubuntu4.9 | [libheif1 1.17.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libheif1-1.17.6-1ubuntu4.9.md) | Oct 2, 2026 | --- Data as of 2026-11-09T07:25:28Z UTC. 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