CVE-2026-3950 · cross-distro fix matrix

CVE-2026-3950: Elhanan Haenel discovered that libheif incorrectly handled certain

Affects 5 Linux releases across 50 (distro × package) combinations. First disclosed: 2026-06-18.

Fix per ecosystem

Each block below is a distro release where CVE-2026-3950 has a known fix. Run the listed command on that distro to remediate.

Ubuntu bionic

Source: Ubuntu USN

libheif→ fixed in1.1.0-2ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif
```
libheif-dev→ fixed in1.1.0-2ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif-dev
```
libheif-examples→ fixed in1.1.0-2ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif-examples
```
libheif1→ fixed in1.1.0-2ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif1
```

Ubuntu focal

Source: Ubuntu USN

libheif→ fixed in1.6.1-1ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif
```
heif-gdk-pixbuf→ fixed in1.6.1-1ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y heif-gdk-pixbuf
```
heif-thumbnailer→ fixed in1.6.1-1ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y heif-thumbnailer
```
libheif-dev→ fixed in1.6.1-1ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif-dev
```
libheif-examples→ fixed in1.6.1-1ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif-examples
```
libheif1→ fixed in1.6.1-1ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif1
```

Ubuntu jammy

Source: Ubuntu USN

libheif→ fixed in1.12.0-2ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif
```
heif-gdk-pixbuf→ fixed in1.12.0-2ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y heif-gdk-pixbuf
```
heif-thumbnailer→ fixed in1.12.0-2ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y heif-thumbnailer
```
libheif-dev→ fixed in1.12.0-2ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif-dev
```
libheif-examples→ fixed in1.12.0-2ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif-examples
```
libheif1→ fixed in1.12.0-2ubuntu0.1~esm3USN-8454-1
```
sudo apt-get install --only-upgrade -y libheif1
```

Ubuntu noble

Source: Ubuntu USN

libheif→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif

heif-gdk-pixbuf→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y heif-gdk-pixbuf

heif-thumbnailer→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y heif-thumbnailer

libheif-dev→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-dev

libheif-examples→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-examples

libheif-plugin-aomdec→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-aomdec

libheif-plugin-aomenc→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-aomenc

libheif-plugin-dav1d→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-dav1d

libheif-plugin-ffmpegdec→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-ffmpegdec

libheif-plugin-j2kdec→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-j2kdec

libheif-plugin-j2kenc→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-j2kenc

libheif-plugin-jpegdec→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-jpegdec

libheif-plugin-jpegenc→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-jpegenc

libheif-plugin-libde265→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-libde265

libheif-plugin-rav1e→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-rav1e

libheif-plugin-svtenc→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-svtenc

libheif-plugin-x265→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-x265

libheif1→ fixed in1.17.6-1ubuntu4.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif1

Ubuntu questing

Source: Ubuntu USN

libheif→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif

heif-gdk-pixbuf→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y heif-gdk-pixbuf

heif-thumbnailer→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y heif-thumbnailer

heif-view→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y heif-view

libheif-dev→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-dev

libheif-examples→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-examples

libheif-plugin-aomdec→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-aomdec

libheif-plugin-aomenc→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-aomenc

libheif-plugin-dav1d→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-dav1d

libheif-plugin-ffmpegdec→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-ffmpegdec

libheif-plugin-j2kdec→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-j2kdec

libheif-plugin-j2kenc→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-j2kenc

libheif-plugin-jpegdec→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-jpegdec

libheif-plugin-jpegenc→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-jpegenc

libheif-plugin-kvazaar→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-kvazaar

libheif-plugin-libde265→ fixed in1.20.2-1ubuntu0.4USN-8454-1

sudo apt-get install --only-upgrade -y libheif-plugin-libde265

Are YOU affected by CVE-2026-3950?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

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