AIKIDO-2026-138709
uu_rm is vulnerable to Race Condition (TOCTOU)
70
High Risk
This Affects:
uu_rmTL;DR
Recursive descent opens subdirectory entries without following symlinks, but the top level operand is still opened by path after a separate metadata check, with no inode re-verification. A local user who controls the operand or its parent directory can swap a directory for a symlink between the check and the open, so deletion reaches outside the intended subtree. The fix re-verifies the opened operand against the checked inode.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you run recursive rm on an operand whose path or parent directory another local user can modify concurrently.
Background info
uu_rm is vulnerable to Race Condition (TOCTOU) in versions 0.0.1 - 0.10.0.
How to fix this
Upgrade the uu_rm library to the patch version.
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