Vulnerability 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 Score
HIGH
Related Weaknesses (CWE)
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
FAQ
What is CVE-2026-15816?
CVE-2026-15816 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 co...
How severe is CVE-2026-15816?
CVE-2026-15816 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-15816?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.