========================================================================== Ubuntu Security Notice USN-8402-1 June 08, 2026
systemd vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in systemd. Software Description: - systemd: system and service manager Details: It was discovered that systemd-nspawn incorrectly handled certain optional configuration files. A local attacker could possibly use this issue to escape to the host system and execute arbitrary code. (CVE-2026-40226) It was discovered that systemd-resolved incorrectly validated DNSSEC records for signed domains. An attacker could possibly use this issue to manipulate DNS records. This issue only affected Ubuntu 22.04 LTS. (CVE-2023-7008) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 libsystemd0 257.9-0ubuntu2.5 libudev1 257.9-0ubuntu2.5 systemd 257.9-0ubuntu2.5 udev 257.9-0ubuntu2.5 Ubuntu 24.04 LTS libsystemd0 255.4-1ubuntu8.16 libudev1 255.4-1ubuntu8.16 systemd 255.4-1ubuntu8.16 udev 255.4-1ubuntu8.16 Ubuntu 22.04 LTS libnss-resolve 249.11-0ubuntu3.21 libsystemd0 249.11-0ubuntu3.21 libudev1 249.11-0ubuntu3.21 systemd 249.11-0ubuntu3.21 udev 249.11-0ubuntu3.21 After a standard system update you need to reboot your computer to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8402-1 CVE-2023-7008, CVE-2026-40226 Package Information: https://launchpad.net/ubuntu/+source/systemd/257.9-0ubuntu2.5 https://launchpad.net/ubuntu/+source/systemd/255.4-1ubuntu8.16 https://launchpad.net/ubuntu/+source/systemd/249.11-0ubuntu3.21
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