CVE-2026-15816

Description

A flaw was found in dracut. The die() error-handling function writes its message into a shell script under the initramfs emergency-hook directory without properly shell-quoting it. When the message contains data derived from the DHCP ROOT_PATH option, an attacker on the adjacent network who controls a rogue DHCP server can inject a command-substitution sequence that executes as root the next time dracut sources its emergency hook scripts during standard boot-failure handling.

CVSS Vector

References

• https://access.redhat.com/security/cve/CVE-2026-15816
• https://bugzilla.redhat.com/show_bug.cgi?id=2459963
• https://bugzilla.redhat.com/show_bug.cgi?id=2500889
• https://github.com/dracutdevs/dracut/blob/master/modules.d/40network/netroot.sh
• https://github.com/dracutdevs/dracut/blob/master/modules.d/99base/dracut-lib.sh