CVE-2026-6893
HighCVSS 7.5Exploitation Probability (EPSS)
Elevated risk62th percentile - higher than 62% of all known CVEs
Summary
A flaw was found in dracut where a remote attacker on the adjacent network can provide specially crafted DHCP options (e.g., a malicious hostname) to a system using dracut's legacy DHCP path. These options are improperly handled and written into temporary shell scripts without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs, potentially compromising the system's boot and network behavior.
Risk Assessment
The risk involves potential remote takeover of the system during early boot (initramfs), which could lead to persistent system compromise, data theft, or network disruption.
Recommendation
It is recommended to immediately update dracut to the latest patched version and, if possible, disable the legacy DHCP path in favor of a more secure alternative.
Original NVD description (English source)
A flaw was found in dracut. A remote attacker on the adjacent network can exploit this vulnerability by providing specially crafted DHCP (Dynamic Host Configuration Protocol) options, such as a malicious hostname, to a system using dracut's legacy DHCP path. These options are improperly handled and written into temporary shell scripts without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs, potentially compromising the system's boot and network behavior.