CVE-2026-35347
Duplicate Advisory: uutils coreutils' comm utility incorrectly consumes data from non-regular file inputs before performing comparison operations
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.
How to fix CVE-2026-35347
To remediate CVE-2026-35347, upgrade the affected package to a fixed version below.
- —upgrade to 0.6.0 or later
- —upgrade to 0.6.0 or later
Is CVE-2026-35347 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0.6.0
- from 0, < 0.6.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.4 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |