Duplicate Advisory: uutils coreutils' comm utility incorrectly consumes data from non-regular file inputs before performing comparison operations

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### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-3wfc-mgpm-9rq6. This link is maintained to preserve external references. ### Original Description The comm utility in uutils coreutils incorrectly consumes data from non-regular file inputs before performing comparison operations. The are_files_identical function opens and reads from both input paths to compare content without first verifying if the paths refer to regular files. If an input path is a FIFO or a pipe, this pre-read operation drains the stream, leading to silent data loss before the actual comparison logic is executed. Additionally, the utility may hang indefinitely if it attempts to pre-read from infinite streams like /dev/zero.

Source published

22 Apr 2026 18:31:45 UTC

Source modified

10 Sep 2026 03:51:03 UTC

Saved here

24 Oct 2026 13:19:54 UTC

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GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V3 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Publisher rating · MODERATE