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Findings

CVE-2026-53612

util-linux is a random collection of Linux utilities.

Published Jun 17, 2026 · corrected/updated Oct 15, 2026 · evidence confidence high

util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID utility's post-mount hook performs path-based and operations on a previously validated mount target. A local low-privileged user authorized by an entry with or and an , , or option can use to race a writable ancestor of the target and redirect the privileged ownership or mode change to a root-owned path, potentially gaining root privileges. This issue is fixed in 2.41.5 and 2.42.2.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2026-53612 is a high public vulnerability record for this product. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether this product is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: util-linux (0 → 2.41.6-r0); util-linux (0 → 2.41.6-r0); util-linux (0 → 2.42.3-r0); util-linux (0 → 2.41.5-0+deb13u1). Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: CVSS 7.0, EPSS 0.1%. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-367. Sources contributing to this record: cve_org, epss, nvd, osv. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.

  • Patch and remediation

    No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Technology hubs

Debian

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 14, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    util-linux fixed in 2.41.5-0+deb13u1; util-linux fixed in 2.42.2-1

  2. Oct 14, 2026 · NIST NVD

    Detected

    util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID utility's post-mount hook performs path-based and operations on a previously validated mount target. A local low-privileged user authorized by an entry with or and an , , or option can use to race a writable ancestor of the target and redirect the privileged ownership or mode c

  3. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    util-linux fixed in 2.41.5-0+deb13u1

  4. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    util-linux fixed in 2.42.2-1

  5. Oct 14, 2026 · NIST NVD

    Updated

    util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID utility's post-mount hook performs path-based and operations on a previously validated mount target. A local low-privileged user authorized by an entry with or and an , , or option can use to race a writable ancestor of the target and redirect the privileged ownership or mode c

  6. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID utility's post-mount hook performs path-based and operations on a previously validated mount target. A local low-privileged user authorized by an entry with or and an , , or option can use to race a writable ancestor of the target and redirect the privileged ownership or mode c

  7. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    util-linux fixed in 2.41.6-r0; util-linux fixed in 2.41.6-r0; util-linux fixed in 2.42.3-r0

  8. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    util-linux fixed in 2.41.6-r0

  9. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    util-linux fixed in 2.42.3-r0

  10. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID utility's post-mount hook performs path-based and operations on a previously validated mount target. A local low-privileged user authorized by an entry with or and an , , or option can use to race a writable ancestor of the target and redirect the privileged ownership or mode c

Affected

  • Alpine:v3.22 util-linux0 → 2.41.6-r0
  • Alpine:v3.23 util-linux0 → 2.41.6-r0
  • Alpine:v3.24 util-linux0 → 2.42.3-r0
  • Debian:13 util-linux0 → 2.41.5-0+deb13u1
  • Debian:14 util-linux0 → 2.42.2-1

Sources

  • CVE.orgVulnerability recordCVE-2026-53612

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-53612

    30-day exploitation probability 0.1%

    first.org
  • NIST NVDVulnerability recordCVE-2026-53612

    util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID utility's post-mount hook performs path-based and operations on a previously validated mount target. A local low-p

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryALPINE-CVE-2026-53612
    osv.dev
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-53612
    osv.dev
  • Trivy Vulnerability DBPackage advisoryALPINE-CVE-2026-53612

    util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID utility's post-mount hook performs path-based and operations on a previously validated mount target. A local low-privileged user authorized by an entry with o

    osv.dev

References