This advisory has been withdrawn because it is a duplicate of GHSA-3wfc-mgpm-9rq6. This link is maintained to preserve external references.
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.
{
"cwe_ids": [
"CWE-20"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-29T23:03:27Z",
"nvd_published_at": "2026-04-22T17:16:36Z",
"severity": "MODERATE"
}