CVE-2026-35347
MEDIUM4.4EPSS 0.02%uutils coreutils' comm utility incorrectly consumes data from non-regular file inputs before performing comparison operations
Published: 4/22/2026Modified: 5/5/2026
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.
Affected packages (2)
- crates.io/coreutilsfrom 0, < 0.6.0
- Debian/rust-coreutilsfrom 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 |
References (6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-35347
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-35347
- PATCHhttps://github.com/uutils/coreutils
- WEBhttps://github.com/uutils/coreutils/commit/75f45e87e52ed95840494963ab9a28651165d56e
- WEBhttps://github.com/uutils/coreutils/pull/9545
- WEBhttps://github.com/uutils/coreutils/releases/tag/0.6.0