UBUNTU-CVE-2026-35341: High severity ubuntu/rust-coreutils vulnerability
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 setpermissions 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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/rust-coreutilsto a version that resolves this vulnerability.Fixed in 0.10.0-1ubuntu1
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
Exploitation requires local access with low privileges. It does not require user interaction.
Does this vulnerability affect availability as well as confidentiality and integrity?
The reported impact is high confidentiality and high integrity impact, with no availability impact. Existing files can have their permissions changed, potentially making sensitive files readable by other local users.
How do default permission settings affect the risk?
The affected existing file can be changed to the default mode, often 644 after applying the system umask. This can expose files that should remain private, such as SSH private keys.