CVE-2026-91837 (GCVE-0-2026-91837)

Vulnerability from cvelistv5 – Published: 2026-09-25 16:14 – Updated: 2026-09-25 16:39
VLAI
Title
Networkmanager-iodine: networkmanager-iodine: local privilege escalation to root via nameserver option injection
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 16:39 UTC
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
Impacted products
Vendor Product Version CPE status
GNOME NetworkManager-iodine Affected: 0 , < * (semver)
guessed Create a notification for this product.
Date Public
2026-09-15 09:25
Credits
Red Hat would like to thank Andreas Gabriel Berbescu for reporting this issue.
Show details on NVD website
To clipboard 

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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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