PatchTheCVECVE-2026-35347: The comm utility in uutils coreutils incorrectly consumes data from non-regular file inputs before performing
CVE-2026-35347 is a medium-severity flaw (CVSS 4.4) affecting coreutils. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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. Additiona
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.4 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.1% (top 97%) |
| CISA exploited list | No |
| Weakness | CWE-20 |
| Published | 2026-04-22 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-35347?
coreutils: upgrade to 0.6.0. Exact commands for each OS are on this page.
Is CVE-2026-35347 being exploited?
CVE-2026-35347 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-35347 affect?
CVE-2026-35347 affects coreutils. Severity is medium (CVSS 4.4). 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 ver
How urgent is CVE-2026-35347?
Priority 16/100. No elevated risk signals yet.
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