A vulnerability in uutils coreutils mkfifo allows for the unauthorized modification of permissions on existing files. When mkfifo fails to create a FIFO because a file already exists at the target path, it fails to terminate the operation for that path and continues to execute a follow-up set_permissions call. This results in the existing file's permissions being changed to the default mode (often 644 after umask), potentially exposing sensitive files such as SSH private keys to other users on the system.
This page covers CVE-2026-35341 as tracked by Ubuntu, for the package rust-coreutils. No fixed version has been recorded for this distribution yet.
This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.
The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
UBUNTU-CVE-2026-35341 is classified as CWE-732: Incorrect Permission Assignment for Critical Resource. A sensitive resource is assigned permissions that let unintended actors read or modify it.
UBUNTU-CVE-2026-35341 is recorded against 1 package.
Published on 22 April 2026 and last revised on 20 May 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
ubuntu.com (Report)
www.cve.org (Report)
github.com (Report)
rust-coreutils has other advisories on record. If you are patching this one, these are worth checking on the same host:
These advisories are the same class of weakness (CWE-732: Incorrect Permission Assignment for Critical Resource) in other software:
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| rust-coreutils | — | — |
References
Similar Threats
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