Description
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.
Affected products
uutils: coreutils
References4
- github.com/uutils/coreutils/pull/9728 Issue TrackingPatch
- github.com/uutils/coreutils/issues/9701 ExploitIssue Tracking
- github.com/uutils/coreutils/issues/9701 ExploitIssue Tracking
- github.com/uutils/coreutils/releases/tag/0.6.0 Release Notes
Metrics
- CVSS 3.1
-
4.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 7 · as of 13 November 2026
- CWE
- CWE-754
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