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HIGH

CVE-2026-15816

CVSS v3

7.5

HIGH

EPSS Score

0.4 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • dracutAlmaLinux:10all versions · fixed in 107-9.el10_2and 7 other packages
  • dracutAlmaLinux:9all versions · fixed in 057-120.git20260728.el9_8and 7 other packages
  • dracutAlmaLinux:8all versions · fixed in 049-246.git20260728.el8_10and 7 other packages

Vendor advisories

  • CVE-2026-15816 Red Hat Product Security269 products fixed · 1 known affected

    dracut: dracut: root code execution via unescaped error message written to sourced emergency hook script in die()

    openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4

  • RHSA-2026:79114 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: dracut security, bug fix, and enhancement update

  • RHSA-2026:70615 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.18.56 bug fix and security update

  • RHSA-2026:74499 Red Hat Product Security9 products fixed

    Red Hat Security Advisory: dracut security update

  • RHSA-2026:70586 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.17.58 bug fix and security update

  • RHSA-2026:67857 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.15.69 bug fix and security update

20 more advisories

Full record on NVD

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-08-07
Last Modified
2026-08-07

Frequently asked questions

What is CVE-2026-15816?

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.

Is CVE-2026-15816 actively exploited?

Active exploitation of CVE-2026-15816 has not been confirmed. Its EPSS score was 0.4% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-15816?

CVE-2026-15816 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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