CVE-2026-35361: coreutils — Exploit & Fix

Description

The mknod utility in uutils coreutils fails to handle security labels atomically by creating device nodes before setting the SELinux context. If labeling fails, the utility attempts cleanup using std::fs::remove_dir, which cannot remove device nodes or FIFOs. This leaves mislabeled nodes behind with incorrect default contexts, potentially allowing unauthorized access to device nodes that should have been restricted by mandatory access controls.

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CVSS v3.1 Score

3.4

LOW

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

EPSS — Exploit Prediction

0.0002

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-281 CWE-281

CWE-459 CWE-459

Affected Products

Vendor	Product	Versions
uutils	coreutils	< 0.6.0

References

Advisories & Patches

https://github.com/uutils/coreutils/pull/10582 https://github.com/uutils/coreutils/pull/10582

Exploits

https://github.com/uutils/coreutils/pull/10582 https://github.com/uutils/coreutils/pull/10582

Other References

https://github.com/uutils/coreutils/releases/tag/0.6.0

Frequently Asked Questions

What is CVE-2026-35361? +

The mknod utility in uutils coreutils fails to handle security labels atomically by creating device nodes before setting the SELinux context. If labeling fails, the utility attempts cleanup using std::fs::remove_dir, which cannot remove device nodes or FIFOs. This leaves mislabeled nodes behind with incorrect default contexts, potentially allowing unauthorized access to device nodes that should have been restricted by mandatory access controls. It has a CVSS v3.1 base score of 3.4 (LOW).

How severe is CVE-2026-35361? +

CVE-2026-35361 has a CVSS v3.1 score of 3.4 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0002, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-35361? +

CVE-2026-35361 affects products from uutils, specifically: coreutils. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-35361? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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