USN-8758-1: dracut vulnerability
Ubuntu patches dracut CVE-2026-15816, where a rogue adjacent-network DHCP server can inject root-executed commands during boot-failure handling.
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Vulnerability4 · 1 read
CVE-2026-15816
- CVSS 3.1
- 7.5 high
- EPSS
- <1%p23
- Published
- ·
- Modified
Description · NVD
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.
- Weakness
- CWE-78
- Vector
- CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H