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.
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History
Wed, 22 Apr 2026 19:15:00 +0000
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Wed, 22 Apr 2026 16:30:00 +0000
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| 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. | |
| Title | uutils coreutils comm Silent Data Loss or Denial of Service via Improper Input Validation | |
| Weaknesses | CWE-20 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: canonical
Published:
Updated: 2026-04-22T18:11:31.441Z
Reserved: 2026-04-02T12:58:56.087Z
Link: CVE-2026-35347
Updated: 2026-04-22T18:11:08.791Z
Status : Awaiting Analysis
Published: 2026-04-22T17:16:36.903
Modified: 2026-04-22T21:23:52.620
Link: CVE-2026-35347
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OpenCVE Enrichment
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