Ubuntu USN · USN-8270-1

Exim vulnerability

Published: Tue, 12 May 2026 14:53

Summary

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

Details

It was discovered that Exim incorrectly handled BDAT body parsing. A remote attacker could use this issue to cause Exim 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 jammy

exim4→4.95-4ubuntu2.8apt_upgrade
Standard apt upgrade. Install 4.95-4ubuntu2.8 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4→4.95-4ubuntu2.8apt_upgrade
Standard apt upgrade. Install 4.95-4ubuntu2.8 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-base→4.95-4ubuntu2.8apt_upgrade
Standard apt upgrade. Install 4.95-4ubuntu2.8 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-base
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-config→4.95-4ubuntu2.8apt_upgrade
Standard apt upgrade. Install 4.95-4ubuntu2.8 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-config
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-daemon-heavy→4.95-4ubuntu2.8apt_upgrade
Standard apt upgrade. Install 4.95-4ubuntu2.8 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-daemon-heavy
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-daemon-light→4.95-4ubuntu2.8apt_upgrade
Standard apt upgrade. Install 4.95-4ubuntu2.8 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-daemon-light
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-dev→4.95-4ubuntu2.8apt_upgrade
Standard apt upgrade. Install 4.95-4ubuntu2.8 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
eximon4→4.95-4ubuntu2.8apt_upgrade
Standard apt upgrade. Install 4.95-4ubuntu2.8 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y eximon4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

exim4→4.97-4ubuntu4.5apt_upgrade
Standard apt upgrade. Install 4.97-4ubuntu4.5 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4→4.97-4ubuntu4.5apt_upgrade
Standard apt upgrade. Install 4.97-4ubuntu4.5 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-base→4.97-4ubuntu4.5apt_upgrade
Standard apt upgrade. Install 4.97-4ubuntu4.5 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-base
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-config→4.97-4ubuntu4.5apt_upgrade
Standard apt upgrade. Install 4.97-4ubuntu4.5 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-config
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-daemon-heavy→4.97-4ubuntu4.5apt_upgrade
Standard apt upgrade. Install 4.97-4ubuntu4.5 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-daemon-heavy
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-daemon-light→4.97-4ubuntu4.5apt_upgrade
Standard apt upgrade. Install 4.97-4ubuntu4.5 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-daemon-light
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-dev→4.97-4ubuntu4.5apt_upgrade
Standard apt upgrade. Install 4.97-4ubuntu4.5 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
eximon4→4.97-4ubuntu4.5apt_upgrade
Standard apt upgrade. Install 4.97-4ubuntu4.5 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y eximon4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu questing

exim4→4.98.2-1ubuntu2.2apt_upgrade
Standard apt upgrade. Install 4.98.2-1ubuntu2.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4→4.98.2-1ubuntu2.2apt_upgrade
Standard apt upgrade. Install 4.98.2-1ubuntu2.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-base→4.98.2-1ubuntu2.2apt_upgrade
Standard apt upgrade. Install 4.98.2-1ubuntu2.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-base
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-config→4.98.2-1ubuntu2.2apt_upgrade
Standard apt upgrade. Install 4.98.2-1ubuntu2.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-config
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-daemon-heavy→4.98.2-1ubuntu2.2apt_upgrade
Standard apt upgrade. Install 4.98.2-1ubuntu2.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-daemon-heavy
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-daemon-light→4.98.2-1ubuntu2.2apt_upgrade
Standard apt upgrade. Install 4.98.2-1ubuntu2.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-daemon-light
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-dev→4.98.2-1ubuntu2.2apt_upgrade
Standard apt upgrade. Install 4.98.2-1ubuntu2.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
eximon4→4.98.2-1ubuntu2.2apt_upgrade
Standard apt upgrade. Install 4.98.2-1ubuntu2.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y eximon4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

exim4→4.99.1-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 4.99.1-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4→4.99.1-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 4.99.1-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-base→4.99.1-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 4.99.1-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-base
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-config→4.99.1-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 4.99.1-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-config
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-daemon-heavy→4.99.1-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 4.99.1-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-daemon-heavy
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-daemon-light→4.99.1-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 4.99.1-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-daemon-light
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
exim4-dev→4.99.1-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 4.99.1-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y exim4-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
eximon4→4.99.1-1ubuntu1.2apt_upgrade
Standard apt upgrade. Install 4.99.1-1ubuntu1.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y eximon4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Are YOU affected by USN-8270-1?

5-second check on your actual server. Reads /etc/os-release, uname -r, and dpkg-query; matches against the live USN + Debian Security Tracker feeds; tells you whether USN-8270-1 (and any other live CVE) applies. Anonymous, no signup.

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

Form-based quickscan Read the bash source first

References

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