CVE-2026-23953 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2026-23953 Interim 1 1 2026-03-05T00:16:35Z current 2026-03-05T00:16:35Z 2026-03-05T00:16:35Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2026-23953 Incus is a system container and virtual machine manager. In versions 6.20.0 and below, a user with the ability to launch a container with a custom YAML configuration (e.g a member of the 'incus' group) can create an environment variable containing newlines, which can be used to add additional configuration items in the container's lxc.conf due to newline injection. This can allow adding arbitrary lifecycle hooks, ultimately resulting in arbitrary command execution on the host. Exploiting this issue on IncusOS requires a slight modification of the payload to change to a different writable directory for the validation step (e.g /tmp). This can be confirmed with a second container with /tmp mounted from the host (A privileged action for validation only). A fix is planned for versions 6.0.6 and 6.21.0, but they have not been released at the time of publication. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://lists.suse.com/pipermail/sle-security-updates/2026-February/024084.html E-Mail link for SUSE-SU-2026:0403-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings openSUSE Tumbleweed incus-6.22-1.1 incus-bash-completion-6.22-1.1 incus-fish-completion-6.22-1.1 incus-tools-6.22-1.1 incus-zsh-completion-6.22-1.1 incus-6.22-1.1 as a component of openSUSE Tumbleweed incus-bash-completion-6.22-1.1 as a component of openSUSE Tumbleweed incus-fish-completion-6.22-1.1 as a component of openSUSE Tumbleweed incus-tools-6.22-1.1 as a component of openSUSE Tumbleweed incus-zsh-completion-6.22-1.1 as a component of openSUSE Tumbleweed Incus is a system container and virtual machine manager. In versions 6.20.0 and below, a user with the ability to launch a container with a custom YAML configuration (e.g a member of the 'incus' group) can create an environment variable containing newlines, which can be used to add additional configuration items in the container's lxc.conf due to newline injection. This can allow adding arbitrary lifecycle hooks, ultimately resulting in arbitrary command execution on the host. Exploiting this issue on IncusOS requires a slight modification of the payload to change to a different writable directory for the validation step (e.g /tmp). This can be confirmed with a second container with /tmp mounted from the host (A privileged action for validation only). A fix is planned for versions 6.0.6 and 6.21.0, but they have not been released at the time of publication. CVE-2026-23953 openSUSE Tumbleweed:incus-6.22-1.1 openSUSE Tumbleweed:incus-bash-completion-6.22-1.1 openSUSE Tumbleweed:incus-fish-completion-6.22-1.1 openSUSE Tumbleweed:incus-tools-6.22-1.1 openSUSE Tumbleweed:incus-zsh-completion-6.22-1.1 important