CVE-2026-10805

Networkmanager: networkmanager: local privilege escalation via malformed mud urls in dhclient backend

publishedCWE-78

A flaw was found in NetworkManager. This local privilege escalation vulnerability exists in NetworkManager's dhclient backend when processing malformed Manufacturer Usage Description (MUD) URLs. A local user can exploit this flaw to escalate privileges by triggering a script via a crafted MUD URL, provided an administrator has explicitly configured NetworkManager to use dhclient. This issue does not affect default configurations of NetworkManager.

Technical severity6.7 mediumCVSS 3.1 · CNA: redhat

Published2026-06-04Source updated 2026-11-05

Collected2026-11-052 attributed sources

Fixes and workarounds

Workaround

To prevent exploitation, ensure NetworkManager is not configured to use the `dhclient` backend. The default configuration on Red Hat Enterprise Linux does not enable `dhclient`. If a custom configuration file, such as `/etc/NetworkManager/conf.d/00-dhcp.conf`, contains `[main] dhcp=dhclient`, remove or comment out this line. After modifying the configuration, restart the NetworkManager service: `sudo systemctl restart NetworkManager` Warning: Restarting the NetworkManager service will temporarily disrupt network connectivity.

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Red Hat Enterprise Linux 8 Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	≥ 1:1.40.16-21.el8_10; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	≥ 1:1.30.0-19.el8_4.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	≥ 1:1.30.0-19.el8_4.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	≥ 1:1.36.0-18.el8_6.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	≥ 1:1.36.0-18.el8_6.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	≥ 1:1.40.16-10.el8_8.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	≥ 1:1.40.16-10.el8_8.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	≥ 1:1.54.3-5.el9_8; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	≥ 1:1.42.2-32.el9_2.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	≥ 1:1.46.0-38.el9_4.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.6 Extended Update Support Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	≥ 1:1.52.0-11.el9_6.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Multicluster Engine for Kubernetes Red Hat `multicluster-engine/cluster-api-provider-aws-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 10 Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat Enterprise Linux 6 Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat Enterprise Linux 7 Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat Hardened Images Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat JBoss Enterprise Application Platform Expansion Pack Red Hat `networkmanager` https://access.redhat.com/jbossnetwork/restricted/listSoftware.html	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `NetworkManager` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift4/kubernetes-nmstate-rhel8-operator` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift4/kubernetes-nmstate-rhel9-operator` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift4/ose-aws-cluster-api-controllers-rhel8` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift4/ose-aws-cluster-api-controllers-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift4/ose-kubernetes-nmstate-handler-rhel8` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift4/ose-kubernetes-nmstate-handler-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift4/ose-ovn-kubernetes-microshift-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift4/ose-ovn-kubernetes-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `redhat-user-workloads/art-images` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 5 Red Hat `openshift5/ose-aws-cluster-api-controllers-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 5 Red Hat `openshift5/ose-ovn-kubernetes-microshift-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 5 Red Hat `openshift5/ose-ovn-kubernetes-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 6.7 medium	`CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H`	CNA: redhat

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://access.redhat.com/errata/RHSA-2026:58555CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:58572CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:61239CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:61243CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:61244CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:61341CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:61572CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:61580CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-10805CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2484613CNA: redhat · issue-tracking, x_refsource_REDHAT

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