medium4.4
CVE-2026-35347
The comm utility in uutils coreutils incorrectly consumes data from non-regular file inputs before performing comparison operations.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | uu_comm | < 0.6.0 | 0.6.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Uutils | Coreutils | before 0.6.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-3wfc-mgpm-9rq6
- https://github.com/uutils/coreutils/security/advisories/GHSA-3wfc-mgpm-9rq6
- https://nvd.nist.gov/vuln/detail/CVE-2026-35347
- https://github.com/uutils/coreutils/pull/9545
- https://github.com/uutils/coreutils/commit/75f45e87e52ed95840494963ab9a28651165d56e
- https://github.com/uutils/coreutils/releases/tag/0.6.0