CVE-2026-35347 Details
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.
A vulnerability in the comm utility of uutils coreutils version 0.6.0 has been identified, where the utility improperly handles data from non-regular file inputs before performing comparison operations. The issue arises because the are_files_identical function reads from both input paths to compare contents without first checking if the paths refer to regular files. This oversight can lead to silent data loss, especially if the input is a FIFO or a pipe, as the pre-read operation drains the stream. Additionally, the utility may hang indefinitely when pre-reading from infinite streams like /dev/zero.
Users can update to uutils coreutils version 0.6.0, which includes a fix for this issue. The updated version can be downloaded from the uutils coreutils GitHub releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 22, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/uutils/coreutils/pull/9545 | CISA-ADP | Issue TrackingPatch |
| https://github.com/uutils/coreutils/pull/9545 | [email protected] | Issue TrackingPatch |
| https://github.com/uutils/coreutils/releases/tag/0.6.0 | [email protected] | Release Notes |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-20 | Improper Input Validation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| uutils coreutils | < 0.6.0 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 27, 2026 | Initial Analysis | [email protected] |
| Apr 22, 2026 | CVE Modified | CISA-ADP |
| Apr 22, 2026 | New CVE Received | [email protected] |