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Findings

Vulnerability · AZL-108555

CVE-2026-53613 affecting package util-linux 2.40.2-6

Published Oct 14, 2026 · corrected/updated Oct 17, 2026 · evidence confidence medium

util-linux is a random collection of Linux utilities. In util-linux 2.17 through 2.41.6 and 2.42 through 2.42.3, and in 2.42.4 when the legacy path is used without , restricted non-root requests validate an target before the mount operation re-resolves that pathname. A local low-privileged user authorized by an fstab or entry whose target has an attacker-writable ancestor can use to swap a path component and redirect an authorized mount to a root-owned location, such as mounting attacker-controlled content over , and thereby gain root privileges. Versions 2.41.5 and 2.42.2 pin targets for the new mount API, and 2.42.4 pins legacy targets through ; the documented legacy fallback without remains affected.

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

AZL-108555 is a unknown 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 → 2.40.2-6). 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: no CVSS/EPSS yet. It is not currently listed in the CISA Known Exploited catalog. Sources contributing to this record: 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.

Code

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

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

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

    Detected

    util-linux is a random collection of Linux utilities. In util-linux 2.17 through 2.41.6 and 2.42 through 2.42.3, and in 2.42.4 when the legacy path is used without , restricted non-root requests validate an target before the mount operation re-resolves that pathname. A local low-privileged user authorized by an fstab or entry whose target has an attacker-writable ancestor can use to swap a path co

  2. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    util-linux fixed in 2.40.2-6

  3. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    util-linux is a random collection of Linux utilities. In util-linux 2.17 through 2.41.6 and 2.42 through 2.42.3, and in 2.42.4 when the legacy path is used without , restricted non-root requests validate an target before the mount operation re-resolves that pathname. A local low-privileged user authorized by an fstab or entry whose target has an attacker-writable ancestor can use to swap a path co

Affected

  • Azure Linux:3 util-linux0 → 2.40.2-6

Sources

References