Bug 2533691

Summary: CVE-2026-91839 NetworkManager-fortisslvpn: NetworkManager-fortisslvpn: local privilege escalation to root via CRLF injection in VPN profile credentials [fedora-all]
Product: [Fedora] Fedora Reporter: Vladimir Vasilev <vvasilev>
Component: NetworkManager-fortisslvpnAssignee: Michael Catanzaro <mcatanza>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: lkundrak, negativo17, peter.georg, thom311
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["b4eb1776-0448-44d4-9f0d-dad0c9ccb5b9"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2533640    

Description Vladimir Vasilev 2026-09-15 10:55:15 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A privilege escalation flaw was found in NetworkManager-fortisslvpn, the FortiSSLVPN plugin for NetworkManager. The root nm-fortisslvpn-service writes VPN connection profile credentials verbatim into a line-oriented configuration file consumed by privileged helper processes, without rejecting embedded carriage-return/line-feed (CR/LF) characters. A local unprivileged user can craft a VPN profile whose credential fields contain CR/LF sequences to inject additional configuration directives, such as pppd-log and pppd-ifname, into this file. By chaining injected directives, an attacker can manipulate /etc/ld.so.preload and achieve arbitrary native code execution as root when the malicious VPN connection is activated.
Comment 1 Fedora Admin user for bugzilla script actions 2026-09-30 21:12:39 UTC 
This package has changed maintainer in Fedora. Reassigning to the new maintainer of this component.