CVE-2026-35376

Publication date 22 April 2026

Last updated 11 November 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

4.5 · Medium

Score breakdown

Description

A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the chcon utility of uutils coreutils during recursive operations. The implementation resolves recursive targets using a fresh path lookup (via fts_accpath) rather than binding the traversal and label application to the specific directory state encountered during traversal. Because these operations are not anchored to file descriptors, a local attacker with write access to a directory tree can exploit timing-sensitive rename or symbolic link races to redirect a privileged recursive relabeling operation to unintended files or directories. This vulnerability breaks the hardening expectations for SELinux administration workflows and can lead to the unauthorized modification of security labels on sensitive system objects.

Status

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

Patch details

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

Package Patch details
rust-coreutils

Severity score breakdown

CVSS version: CVSS v3.0

Base score 4.5 · Medium

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

References

Related Ubuntu Security Notices (USN)

    • USN-9041-1
    • uutils coreutils vulnerabilities
    • 11 November 2026

Other references

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