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.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://github.com/uutils/coreutils/pull/9728 Issue Tracking, Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 4.4 · uutilsNVD modified 2026-10-26 22:10
Affected (CPE criteria) 1
cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:*
References 4
- https://github.com/uutils/coreutils/issues/9701 Exploit, Issue Tracking
- https://github.com/uutils/coreutils/pull/9728 Issue Tracking, Patch
- https://github.com/uutils/coreutils/releases/tag/0.6.0 Release Notes
- https://github.com/uutils/coreutils/issues/9701 Exploit, Issue Tracking