CVE-2026-35345

Publication date 22 April 2026

Last updated 11 November 2026

Ubuntu priority

Cvss 3 Severity Score

Description

A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents when using the --follow=name option. Unlike GNU tail, the uutils implementation continues to monitor a path after it has been replaced by a symbolic link, subsequently outputting the contents of the link's target. In environments where a privileged user (e.g., root) monitors a log directory, a local attacker with write access to that directory can replace a log file with a symlink to a sensitive system file (such as /etc/shadow), causing tail to disclose the contents of the sensitive file.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
rust-coreutils	26.10 stonking	Fixed in 0.10.0-1ubuntu1
	26.04 LTS resolute	Fixed in 0.10.0-1ubuntu2~26.04.1
	25.10 questing	Ignored end of life, was needed
	24.04 LTS noble	Vulnerable
	22.04 LTS jammy	Not in release

Notes

john-breton

Fixed in 0.10.0-1ubuntu2~26.04.1 in resolute-updates (LP: #2166202), but not yet in the -security pocket.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
rust-coreutils	Upstream: 2c2f1b0

Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.3 · Medium

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	Low
Availability impact	None

Scores

Parameter	Value
Base score	5.3 · Medium
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N

References

Related Ubuntu Security Notices (USN)

USN-9041-1
uutils coreutils vulnerabilities
11 November 2026

Other references

https://www.cve.org/CVERecord?id=CVE-2026-35345