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🛡️ CVE-2026-35361 — coreutils

🟢 CVSS 2.0 — Low ⚠️ Exploit Public CWE-281 OSV
2.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

mknod: Device nodes created mislabeled on SELinux, with broken cleanup (remove_dir on a node)

uutils calls mknod *before* setting the SELinux context (GNU uses setfscreatecon first, labeling atomically). If set_selinux_security_context fails, cleanup uses std::fs::remove_dir, which cannot remove device nodes or FIFOs, leaving the mislabeled node behind.

Impact: on SELinux-enforcing systems the node is created with the wrong context; the command reports failure but leaves a mislabeled device node that may bypass mandatory access control, and orphaned nodes can persist across reboots. Recommendation: use setfscreatecon before mknod, abort on failure, and use remove_file for cleanup.

Remediation: Acknowledged by Canonical.

_Reported by Zellic in the *uutils coreutils Program Security Assessment* (prepared for Canonical, Jan 20 2026), audited commit 3a07ffc5a9bd4c283e75afa548ba1f1957bad242. Finding 3.58. Credit: Zellic._

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: High — administrative rights are needed first.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
  • Integrity impact: Low — limited, and the attacker does not choose what is affected.
  • Availability impact: None.

Weakness class

CVE-2026-35361 is classified as CWE-281: Improper Preservation of Permissions. Permissions are not carried over correctly during an operation such as copy or restore, widening access.

Affected software

CVE-2026-35361 is recorded against 2 packages.

  • coreutils
  • uu-mknod

Timeline and source

Published on 22 April 2026 and last revised on 6 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)

Other advisories for this package

coreutils has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-281: Improper Preservation of Permissions) in other software:

CVE-2026-35361 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity LOW
CVSS Score 2.0
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
CWE CWE-281
Public Exploit ⚠️ Yes
Source OSV
Published 2026-04-22
Updated 2026-08-20
Modified 2026-07-06

Affected Packages

Software From version Fixed in
coreutils — —
uu-mknod — —

Similar Threats

Exploit Protection

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CVE-2026-35361 carries CVSS 2.0 Low rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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