Bug 2533690

Summary: CVE-2026-91839 NetworkManager-fortisslvpn: NetworkManager-fortisslvpn: local privilege escalation to root via CRLF injection in VPN profile credentials [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Vladimir Vasilev <vvasilev>
Component: NetworkManager-fortisslvpnAssignee: Lubomir Rintel <lkundrak>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: epel10CC: lkundrak, negativo17, peter.georg, thom311
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["b4eb1776-0448-44d4-9f0d-dad0c9ccb5b9"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2533640    

Description Vladimir Vasilev 2026-09-15 10:55:04 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.