Bug 2449311 (CVE-2026-30874)

Summary: CVE-2026-30874 OpenWrt: procd: OpenWrt procd: Privilege escalation via PATH environment variable injection
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the `procd` component of OpenWrt. A highly privileged local attacker can bypass environment variable filtering in the `hotplug_call` function by injecting an arbitrary `PATH` variable. This vulnerability, caused by an incorrect string comparison, allows the attacker to control which binaries are executed by `procd`-invoked scripts running with elevated privileges, potentially leading to privilege escalation.
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Description OSIDB Bzimport 2026-03-19 23:05:24 UTC 
OpenWrt Project is a Linux operating system targeting embedded devices. In versions prior to 24.10.6, a vulnerability in the hotplug_call function allows an attacker to bypass environment variable filtering and inject an arbitrary PATH variable, potentially leading to privilege escalation. The function is intended to filter out sensitive environment variables like PATH when executing hotplug scripts in /etc/hotplug.d, but a bug using strcmp instead of strncmp causes the filter to compare the full environment string (e.g., PATH=/some/value) against the literal "PATH", so the match always fails. As a result, the PATH variable is never excluded, enabling an attacker to control which binaries are executed by procd-invoked scripts running with elevated privileges. This issue has been fixed in version 24.10.6.