Vulnerability · Published Apr 22, 2026 · Assigned by canonical
CVE-2026-35358uutils coreutils cp Semantic Loss and Potential Denial of Service with -R via Device Node Stream Reading
Medium 4.4
In plain English
A medium-severity security flaw in coreutils from Uutils. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
The cp utility in uutils coreutils, when performing recursive copies (-R), incorrectly treats character and block device nodes as stream sources rather than preserving them. Because the implementation reads bytes into regular files at the destination instead of using mknod, device semantics are destroyed (e.g., /dev/null becomes a regular file). This behavior can lead to runtime denial of service through disk exhaustion or process hangs when reading from unbounded device nodes.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rust-coreutils | no fix listed | DEBIAN-CVE-2026-35358 |
| Debian:13 | rust-coreutils | no fix listed | DEBIAN-CVE-2026-35358 |
| Debian:14 | rust-coreutils | 0.7.0-1 | DEBIAN-CVE-2026-35358 |
| Ubuntu:24.04:LTS | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35358 |
| Ubuntu:25.10 | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35358 |
Affected products (as reported)
Weakness: CWE-706 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
References
- https://github.com/uutils/coreutils/pull/11163 patch
- https://github.com/uutils/coreutils/issues/9746 issue-tracking
- https://github.com/uutils/coreutils/releases/tag/0.7.0 vendor-advisory