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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.
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:58555 https://access.redhat.com/errata/RHSA-2026:58555
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:58572 https://access.redhat.com/errata/RHSA-2026:58572
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Via RHSA-2026:61239 https://access.redhat.com/errata/RHSA-2026:61239
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:61244 https://access.redhat.com/errata/RHSA-2026:61244
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Via RHSA-2026:61243 https://access.redhat.com/errata/RHSA-2026:61243
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Via RHSA-2026:61580 https://access.redhat.com/errata/RHSA-2026:61580
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat Enterprise Linux 8.8 Telecommunications Update Service Via RHSA-2026:61572 https://access.redhat.com/errata/RHSA-2026:61572
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.6 Extended Update Support Via RHSA-2026:61341 https://access.redhat.com/errata/RHSA-2026:61341