Security Advisory catalog CVE-2026-78408 Historical advisory recorded 5 Nov 2026 00:54:08 UTC. Read the latest advisory .
cve-program · CVE-2026-78408 Published
The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve(). Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an attacker-controlled target can inherit root's ability to move host processes between cgroups. After a privileged operator uses --join-cgroup against that target, an unprivileged user can migrate and terminate unrelated root processes.
Read the publisher's advisory Affected versions, risk and source history
cve-program · CVE-2026-78408 Published util-linux https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "util-linux",
"defaultStatus": "affected",
"versions": [
{
"version": "0:2.40.2-18.el10_2.20",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/o:redhat:enterprise_linux:10.2"
]
} util-linux-main https://catalog.redhat.com/software/containers/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat Hardened Images",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "util-linux-main",
"defaultStatus": "affected",
"versions": [
{
"version": "2.42.2-3.4.hum1",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
],
"cpes": [
"cpe:/a:redhat:hummingbird:1"
]
} util-linux https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 7",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "util-linux",
"defaultStatus": "unaffected",
"cpes": [
"cpe:/o:redhat:rhel_els:7"
]
} util-linux https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "util-linux",
"defaultStatus": "unaffected",
"cpes": [
"cpe:/a:redhat:enterprise_linux:8"
]
} rhel8/flatpak-runtime https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "rhel8/flatpak-runtime",
"defaultStatus": "unaffected",
"cpes": [
"cpe:/a:redhat:enterprise_linux:9"
]
} rhel8/flatpak-sdk https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "rhel8/flatpak-sdk",
"defaultStatus": "unaffected",
"cpes": [
"cpe:/a:redhat:enterprise_linux:9"
]
} util-linux https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "util-linux",
"defaultStatus": "unaffected",
"cpes": [
"cpe:/a:redhat:enterprise_linux:9"
]
} openshift/ose-rhel-coreos-8 https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "openshift/ose-rhel-coreos-8",
"defaultStatus": "unaffected",
"cpes": [
"cpe:/a:redhat:openshift:4"
]
} openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "openshift/ose-rhel-coreos-9",
"defaultStatus": "unaffected",
"cpes": [
"cpe:/a:redhat:openshift:4"
]
} openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/
Publisher's version information Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 5",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "openshift/ose-rhel-coreos-9",
"defaultStatus": "unaffected",
"cpes": [
"cpe:/a:redhat:openshift:5"
]
} Original source record · Cite this exact observation · Complete original publisher JSON