CVE-2026-6893Public exploit

Root code execution via unescaped DHCP options

Published Jun 10, 2026 · Updated Aug 25, 2026

OS command injection in dracut's legacy DHCP path allows remote attackers on adjacent networks to execute code as root in initramfs. The dhclient-script.sh path writes attacker-controlled hostname and route values into temporary shell scripts without shell escaping, and net-lib.sh later sources those files as root. Exploitation requires the legacy DHCP path during initramfs network setup and control of a DHCP server on the same network segment, granting root control over boot and network behavior.

CVSS severity7.5
High
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in dracut's legacy DHCP path allows remote attackers on adjacent networks to execute code as root in initramfs. The dhclient-script.sh path writes attacker-controlled hostname and route values into temporary shell scripts without shell escaping, and net-lib.sh later sources those files as root. Exploitation requires the legacy DHCP path during initramfs network setup and control of a DHCP server on the same network segment, granting root control over boot and network behavior.

The record

CVE
CVE-2026-6893
Published
Jun 10, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5Red HatCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix and Linux Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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