CVE-2026-35347
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Mixed 3 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Fixed | 0.6.0-1 |
| bookworm | Affected | — |
References
- 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
- https://github.com/uutils/coreutils/releases/tag/0.6.0
- https://security-tracker.debian.org/tracker/CVE-2026-35347
- https://github.com/advisories/GHSA-rx8h-33gr-vhj9
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.