CVE-2026-34743 · cross-distro fix matrix

CVE-2026-34743: It was discovered that XZ Utils did not properly manage memory when

Affects 10 Linux releases across 38 (distro × package) combinations. First disclosed: 2026-06-02.

Fix per ecosystem

Each block below is a distro release where CVE-2026-34743 has a known fix. Run the listed command on that distro to remediate.

Ubuntu bionic

Source: Ubuntu USN

xz-utils→ fixed in5.2.2-1.3ubuntu0.1+esm1USN-8362-1
```
sudo apt-get install --only-upgrade -y xz-utils
```
liblzma-dev→ fixed in5.2.2-1.3ubuntu0.1+esm1USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma-dev
```
liblzma-doc→ fixed in5.2.2-1.3ubuntu0.1+esm1USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma-doc
```
liblzma5→ fixed in5.2.2-1.3ubuntu0.1+esm1USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma5
```
xzdec→ fixed in5.2.2-1.3ubuntu0.1+esm1USN-8362-1
```
sudo apt-get install --only-upgrade -y xzdec
```

Ubuntu focal

Source: Ubuntu USN

xz-utils→ fixed in5.2.4-1ubuntu1.1+esm1USN-8362-1
```
sudo apt-get install --only-upgrade -y xz-utils
```
liblzma-dev→ fixed in5.2.4-1ubuntu1.1+esm1USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma-dev
```
liblzma-doc→ fixed in5.2.4-1ubuntu1.1+esm1USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma-doc
```
liblzma5→ fixed in5.2.4-1ubuntu1.1+esm1USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma5
```
xzdec→ fixed in5.2.4-1ubuntu1.1+esm1USN-8362-1
```
sudo apt-get install --only-upgrade -y xzdec
```

Ubuntu jammy

Source: Ubuntu USN

xz-utils→ fixed in5.2.5-2ubuntu1.1USN-8362-1

sudo apt-get install --only-upgrade -y xz-utils

liblzma-dev→ fixed in5.2.5-2ubuntu1.1USN-8362-1

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

liblzma-doc→ fixed in5.2.5-2ubuntu1.1USN-8362-1

sudo apt-get install --only-upgrade -y liblzma-doc

liblzma5→ fixed in5.2.5-2ubuntu1.1USN-8362-1

sudo apt-get install --only-upgrade -y liblzma5

xzdec→ fixed in5.2.5-2ubuntu1.1USN-8362-1

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

Ubuntu noble

Source: Ubuntu USN

xz-utils→ fixed in5.6.1+really5.4.5-1ubuntu0.3USN-8362-1
```
sudo apt-get install --only-upgrade -y xz-utils
```
liblzma-dev→ fixed in5.6.1+really5.4.5-1ubuntu0.3USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma-dev
```
liblzma-doc→ fixed in5.6.1+really5.4.5-1ubuntu0.3USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma-doc
```
liblzma5→ fixed in5.6.1+really5.4.5-1ubuntu0.3USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma5
```
xzdec→ fixed in5.6.1+really5.4.5-1ubuntu0.3USN-8362-1
```
sudo apt-get install --only-upgrade -y xzdec
```

Ubuntu questing

Source: Ubuntu USN

xz-utils→ fixed in5.8.1-1ubuntu0.1USN-8362-1

sudo apt-get install --only-upgrade -y xz-utils

liblzma-dev→ fixed in5.8.1-1ubuntu0.1USN-8362-1

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

liblzma-doc→ fixed in5.8.1-1ubuntu0.1USN-8362-1

sudo apt-get install --only-upgrade -y liblzma-doc

liblzma5→ fixed in5.8.1-1ubuntu0.1USN-8362-1

sudo apt-get install --only-upgrade -y liblzma5

xzdec→ fixed in5.8.1-1ubuntu0.1USN-8362-1

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

Ubuntu trusty

Source: Ubuntu USN

xz-utils→ fixed in5.1.1alpha+20120614-2ubuntu2.14.04.1+esm2USN-8362-1
```
sudo apt-get install --only-upgrade -y xz-utils
```
liblzma-dev→ fixed in5.1.1alpha+20120614-2ubuntu2.14.04.1+esm2USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma-dev
```
liblzma-doc→ fixed in5.1.1alpha+20120614-2ubuntu2.14.04.1+esm2USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma-doc
```
liblzma5→ fixed in5.1.1alpha+20120614-2ubuntu2.14.04.1+esm2USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma5
```
xzdec→ fixed in5.1.1alpha+20120614-2ubuntu2.14.04.1+esm2USN-8362-1
```
sudo apt-get install --only-upgrade -y xzdec
```

Ubuntu xenial

Source: Ubuntu USN

xz-utils→ fixed in5.1.1alpha+20120614-2ubuntu2.16.04.1+esm2USN-8362-1
```
sudo apt-get install --only-upgrade -y xz-utils
```
liblzma-dev→ fixed in5.1.1alpha+20120614-2ubuntu2.16.04.1+esm2USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma-dev
```
liblzma-doc→ fixed in5.1.1alpha+20120614-2ubuntu2.16.04.1+esm2USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma-doc
```
liblzma5→ fixed in5.1.1alpha+20120614-2ubuntu2.16.04.1+esm2USN-8362-1
```
sudo apt-get install --only-upgrade -y liblzma5
```
xzdec→ fixed in5.1.1alpha+20120614-2ubuntu2.16.04.1+esm2USN-8362-1
```
sudo apt-get install --only-upgrade -y xzdec
```

Alpine v3.20

Source: Alpine secdb

xz→ fixed in5.8.3-r0
```
apk update && apk add --upgrade xz
```

Alpine v3.21

Source: Alpine secdb

xz→ fixed in5.8.3-r0
```
apk update && apk add --upgrade xz
```

Alpine edge

Source: Alpine secdb

xz→ fixed in5.8.3-r0
```
apk update && apk add --upgrade xz
```

Are YOU affected by CVE-2026-34743?

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