{"id":"CVE-2026-15816","aliases":[],"title":"Dracut: dracut: root code execution via unescaped error message written to sourced emergency hook script in die()","titleSource":"redhat","descriptionSource":"redhat","products":[{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 10","platforms":[],"versions":[{"version":"0:107-9.el10_2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-15816"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 10.0 Extended Update Support","platforms":[],"versions":[{"version":"0:105-4.el10_0.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-15816"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 6 Extended Lifecycle Support  - 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4.22","platforms":[],"versions":[{"version":"4.22.9.8.202609081748-0","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-15816"},{"vendor":"Red Hat","name":"Red Hat Hardened Images","platforms":[],"versions":[],"defaultStatus":"unaffected","source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-15816"}],"remediation":[{"text":"Restrict DHCP server access on networks used for network boot (DHCP snooping, dedicated/trusted provisioning VLANs) until a fix is available.","source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-15816"}],"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handling.","severity":"high","score":7.5,"published":"2026-08-07T10:33:33.612Z","modified":"2026-10-27T21:54:56.067Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://access.redhat.com/errata/RHSA-2026:54571","https://access.redhat.com/errata/RHSA-2026:54575","https://access.redhat.com/errata/RHSA-2026:54576","https://access.redhat.com/errata/RHSA-2026:57580","https://access.redhat.com/errata/RHSA-2026:57772","https://access.redhat.com/errata/RHSA-2026:57775","https://access.redhat.com/errata/RHSA-2026:57785","https://access.redhat.com/errata/RHSA-2026:60440","https://access.redhat.com/errata/RHSA-2026:60445","https://access.redhat.com/errata/RHSA-2026:61252","https://access.redhat.com/errata/RHSA-2026:62269","https://access.redhat.com/errata/RHSA-2026:62409","https://access.redhat.com/errata/RHSA-2026:62549","https://access.redhat.com/errata/RHSA-2026:63041","https://access.redhat.com/errata/RHSA-2026:63044","https://access.redhat.com/errata/RHSA-2026:65839","https://access.redhat.com/errata/RHSA-2026:65851","https://access.redhat.com/errata/RHSA-2026:66357","https://access.redhat.com/errata/RHSA-2026:67857","https://access.redhat.com/errata/RHSA-2026:69118","https://access.redhat.com/errata/RHSA-2026:69119","https://access.redhat.com/errata/RHSA-2026:70586","https://access.redhat.com/errata/RHSA-2026:70615","https://access.redhat.com/errata/RHSA-2026:74499","https://access.redhat.com/errata/RHSA-2026:79114","https://access.redhat.com/errata/RHSA-2026:90272","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"],"sources":[{"name":"CVE","id":"CVE-2026-15816","modified":"2026-10-27T21:54:56.067Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-15816"}],"assessments":[{"source":"redhat","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":7.5}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T19:55:31.817Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}