{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-15816","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","state":"PUBLISHED","assignerShortName":"redhat","dateReserved":"2026-07-15T11:41:57.564Z","datePublished":"2026-08-07T10:33:33.612Z","dateUpdated":"2026-08-20T22:04:08.557Z"},"containers":{"cna":{"title":"Dracut: dracut: root code execution via unescaped error message written to sourced emergency hook script in die()","metrics":[{"other":{"content":{"value":"Important","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS"}],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"dracut","defaultStatus":"affected","versions":[{"version":"0:107-9.el10_2","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/o:redhat:enterprise_linux:10.2"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10.0 Extended Update 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4","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhcos","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift:4"]}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:54571","name":"RHSA-2026:54571","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:54575","name":"RHSA-2026:54575","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:54576","name":"RHSA-2026:54576","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:57580","name":"RHSA-2026:57580","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:57772","name":"RHSA-2026:57772","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:57775","name":"RHSA-2026:57775","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:57785","name":"RHSA-2026:57785","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-15816","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2459963"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2500889","name":"RHBZ#2500889","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://github.com/dracutdevs/dracut/blob/master/modules.d/40network/netroot.sh"},{"url":"https://github.com/dracutdevs/dracut/blob/master/modules.d/99base/dracut-lib.sh"}],"datePublic":"2026-08-05T23:59:00.000Z","problemTypes":[{"descriptions":[{"cweId":"CWE-78","description":"Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","lang":"en","type":"CWE"}]}],"x_redhatCweChain":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","workarounds":[{"lang":"en","value":"Restrict DHCP server access on networks used for network boot (DHCP snooping, dedicated/trusted provisioning VLANs) until a fix is available."}],"timeline":[{"lang":"en","time":"2026-06-10T19:21:21.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-08-05T23:59:00.000Z","value":"Made public."}],"credits":[{"lang":"en","value":"This issue was discovered by Pavel Valena (Red Hat)."}],"providerMetadata":{"orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat","dateUpdated":"2026-08-20T22:04:08.557Z"},"x_generator":{"engine":"cvelib 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