Bug 2460798 (CVE-2026-35366)

Summary: CVE-2026-35366 rust-coreutils: uutils coreutils printenv: Security Inspection Bypass via invalid UTF-8 environment variables
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the `printenv` utility within `uutils coreutils`. This vulnerability allows an attacker to conceal malicious environment variables by using invalid UTF-8 byte sequences. As a result, security tools and administrators may not detect these hidden variables, which could enable undetected attacks like library injection. This oversight can lead to unauthorized code execution or other security breaches.
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Bug Depends On: 2463765, 2463766    
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Description OSIDB Bzimport 2026-04-22 17:03:17 UTC 
The printenv utility in uutils coreutils fails to display environment variables containing invalid UTF-8 byte sequences. While POSIX permits arbitrary bytes in environment strings, the uutils implementation silently skips these entries rather than printing the raw bytes. This vulnerability allows malicious environment variables (e.g., adversarial LD_PRELOAD values) to evade inspection by administrators or security auditing tools, potentially allowing library injection or other environment-based attacks to go undetected.