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CVE record · CVE-2026-78408

Util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority

CVSS 7.9 HighEPSS 0.0024 · 14th percentile

Published by the CVE Program (CNA: redhat) at 2 Sept 2026, 15:05 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 Package name: util-linux https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:2.40.2-18.el10_2.20 to before * rpm
Other versions: affected
Red Hat Red Hat Cost Management On-Premise 1 Package name: costmanagement/costmanagement-ui-rhel10 https://catalog.redhat.com/software/containers/
  • unaffected 1793825318 to before * rpm
Other versions: affected
Red Hat Red Hat Hardened Images Package name: util-linux-main https://catalog.redhat.com/software/containers/
  • unaffected 2.42.2-3.4.hum1 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 7 Package name: util-linux https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unaffected
Red Hat Red Hat Enterprise Linux 8 Package name: util-linux https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unaffected
Red Hat Red Hat Enterprise Linux 9 Package name: rhel8/flatpak-runtime https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unaffected
Red Hat Red Hat Enterprise Linux 9 Package name: rhel8/flatpak-sdk https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unaffected
Red Hat Red Hat Enterprise Linux 9 Package name: util-linux https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unaffected
Red Hat Red Hat OpenShift Container Platform 4 Package name: openshift/ose-rhel-coreos-8 https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unaffected
Red Hat Red Hat OpenShift Container Platform 4 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unaffected
Red Hat Red Hat OpenShift Container Platform 5 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unaffected
Identifiers
CVE-2026-78408
CNA
redhat
Weakness (CWE)
CWE-775
Tags
Published
2 Sept 2026
Updated
5 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.9 High 3.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:H CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0024, the 14th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 2 Sept 2026, 15:05 UTC Confirmed by the CVE List
  2. 2 Sept 2026, 16:17 UTC Confirmed by NVD

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.