AIKIDO-2026-903966
uu_stdbuf is vulnerable to Untrusted Search Path
73
High Risk
This Affects:
uu_stdbufTL;DR
The stdbuf utility writes its helper library into a temporary directory derived from TMPDIR and adds that path to LD_PRELOAD. A TMPDIR value containing a colon splits LD_PRELOAD into multiple entries, so the dynamic loader preloads an unrelated library before main runs. The fix rejects a resolved library path that contains a colon.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and a local user can set TMPDIR when you run stdbuf.
Background info
uu_stdbuf is vulnerable to Untrusted Search Path in versions 0.0.1 - 0.9.0.
How to fix this
Upgrade the uu_stdbuf library to the patch version.
Are You Affected?
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