Ubuntu USN · USN-8485-1

libyang vulnerability

Published: Tue, 30 Jun 2026 11:49

CVE-2026-41401

Summary

libyang could be made to crash or run programs if it received specially crafted network traffic.

Details

It was discovered that libyang incorrectly handled certain metadata list pointers. An attacker could use this issue to cause libyang to crash, resulting in a denial of service, or possibly execute arbitrary code.

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu questing

libyang→3.13.5-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 3.13.5-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libyang
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libyang-dev→3.13.5-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 3.13.5-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libyang-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libyang3→3.13.5-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 3.13.5-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libyang3
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libyang3-tools→3.13.5-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 3.13.5-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libyang3-tools
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

libyang→3.13.6-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 3.13.6-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libyang
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libyang-dev→3.13.6-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 3.13.6-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libyang-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libyang3→3.13.6-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 3.13.6-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libyang3
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libyang3-tools→3.13.6-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 3.13.6-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libyang3-tools
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Are YOU affected by USN-8485-1?

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