A TOCTOU race condition was found in the way 'annotate-output' (used to execute a program annotating the output linewise with time and stream) tool of rpmdevtools, a suite of scripts and (X)Emacs support files to aid in development of RPM packages, performed management of its temporary files used for standard output and standard error output. A local attacker could use this flaw to conduct symbolic link attacks, possibly leading to their ability in an unauthorized way to alter files belonging to the user running the 'annotate-output' tool.

Issue found by Jim Meyering of Red Hat.