CVE-2026-35379 uutils coreutils tr Local Logic Error and Data Integrity Issue in Character Class Handling
Logic error in tr utility incorrectly handles character classes, causing unintended data modification or loss in scripts relying on standard POSIX semantics.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-35379?
CVE-2026-35379 is a low-severity vulnerability in Uutils coreutils, published on 22 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A logic error in the tr utility of uutils coreutils causes the program to incorrectly define the [:graph:] and [:print:] character classes. The implementation mistakenly includes the ASCII space character (0x20) in the [:graph:] class and excludes it from the [:print:] class, effectively reversing the standard behavior established by POSIX and GNU coreutils. This vulnerability leads to unintended data modification or loss when the utility is used in automated scripts or data-cleaning pipelines that rely on standard character class semantics. For example, a command executed to delete all graphical characters while intending to preserve whitespace will incorrectly delete all ASCII spaces, potentially resulting in data corruption or logic failures in downstream processing.
Weakness: CWE-684
Which versions are affected by CVE-2026-35379?
2 open source packages ship an affected version, including coreutils. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
coreutils crates.io | All versions | 0.8.0 |
coreutils crates.io | All versions | 0.8.0 |
Products include Uutils Coreutils.
How do I fix CVE-2026-35379?
Upgrade coreutils to 0.8.0 or later.
Is CVE-2026-35379 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35379 exists.
Other vulnerabilities in Uutils coreutils
- CVE-2026-35338 uutils coreutils chmod Path Traversal Bypass of --preserve-root
- CVE-2026-35368 uutils coreutils chroot Local Privilege Escalation and chroot Escape in via Name Service Switch (NSS) Injection
- CVE-2026-35341 uutils coreutils mkfifo Unauthorized Permission Change on Existing Files
- CVE-2026-35352 uutils coreutils mkfifo Privilege Escalation via TOCTOU Race Condition
- CVE-2026-35349 uutils coreutils Path-Based Safety Bypass with --preserve-root
Sources
Also known as DEBIAN-CVE-2026-35379, GHSA-fhr3-xh3q-69w6, UBUNTU-CVE-2026-35379.