CVE-2026-91837

Networkmanager-iodine: networkmanager-iodine: local privilege escalation to root via nameserver option injection

Published Sep 25, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
A flaw was found in NetworkManager-iodine, the iodine VPN plugin for NetworkManager. A local unprivileged user can exploit a vulnerability in how the 'nameserver' setting is processed when establishing an iodine VPN connection. By embedding shell metacharacters (special characters that can execute commands) in the 'nameserver' value, an attacker can inject and execute arbitrary commands. These commands run with root privileges before the application drops its elevated permissions, leading to local privilege escalation.

Remediation

Vendor Workaround

To mitigate this issue, remove the `NetworkManager-iodine` and `iodine` packages if they are not required for system functionality. These packages are not installed by default in minimal Red Hat Enterprise Linux installations. ```bash sudo dnf remove NetworkManager-iodine iodine ``` If these packages are necessary, ensure that only trusted users have the ability to create and activate VPN connections.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Gnome
Gnome networkmanager-iodine
Vendors & Products Gnome
Gnome networkmanager-iodine
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A flaw was found in NetworkManager-iodine, the iodine VPN plugin for NetworkManager. A local unprivileged user can exploit a vulnerability in how the 'nameserver' setting is processed when establishing an iodine VPN connection. By embedding shell metacharacters (special characters that can execute commands) in the 'nameserver' value, an attacker can inject and execute arbitrary commands. These commands run with root privileges before the application drops its elevated permissions, leading to local privilege escalation.
Title Networkmanager-iodine: networkmanager-iodine: local privilege escalation to root via nameserver option injection
Weaknesses CWE-78
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
fedora
Published
Updated
Sep 25, 2026, 4:39 PM
Reserved
Sep 15, 2026, 8:28 AM
Status
Deferred
Published
Sep 25, 2026, 5:17 PM
Modified
Sep 30, 2026, 7:57 PM