acl before version 2.4.0 contains a symlink traversal vulnerability in the libacl pathname-based functions acl_get_file(), acl_set_file(), acl_extended_file(), and acl_delete_def_file() that allows local attackers to escalate privileges by replacing any pathname component with a symbolic link. Attackers who control any component of a pathname processed by a privileged caller can redirect ACL read or write operations to arbitrary files or directories, enabling unauthorized manipulation of access control lists and local privilege escalation.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1986 advisory.

    A flaw was found in the `acl` component, specifically within its `libacl` pathname-based functions. A     local attacker could exploit this vulnerability by using a symbolic link to replace a pathname component.
    This could allow the attacker to redirect access control list (ACL) read or write operations to arbitrary     files or directories, leading to unauthorized manipulation of ACLs and ultimately local privilege     escalation. (CVE-2026-54369)

    A time-of-check to time-of-use (TOCTOU) race condition vulnerability was found in acl. By replacing a     pathname component with a symbolic link between a security check and subsequent file operations, an     attacker can redirect file access control list operations. This occurs when privileged processes invoke     `getfacl` or `setfacl` over an attacker-controlled path, potentially leading to local privilege     escalation. (CVE-2026-54370)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-67504c329b advisory.

    * rebase to v2.4.0 to fix CVE-2026-54369 and CVE-2026-54370

    Resolves: CVE-2026-54369     Resolves: CVE-2026-54370

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-6b9a652463 advisory.

    * rebase to v2.4.0 to fix CVE-2026-54369 and CVE-2026-54370

    Resolves: CVE-2026-54369     Resolves: CVE-2026-54370

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - acl before version 2.4.0 contains a symlink traversal vulnerability in the libacl pathname-based functions     acl_get_file(), acl_set_file(), acl_extended_file(), and acl_delete_def_file() that allows local attackers     to escalate privileges by replacing any pathname component with a symbolic link. Attackers who control any     component of a pathname processed by a privileged caller can redirect ACL read or write operations to     arbitrary files or directories, enabling unauthorized manipulation of access control lists and local     privilege escalation. (CVE-2026-54369)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
328504	Amazon Linux 2023 : acl, libacl, libacl-devel (ALAS2023-2026-1986)	Nessus	Amazon Linux Local Security Checks	high
326431	Fedora 43 : acl (2026-67504c329b)	Nessus	Fedora Local Security Checks	high
326364	Fedora 44 : acl (2026-6b9a652463)	Nessus	Fedora Local Security Checks	high
323731	Linux Distros Unpatched Vulnerability : CVE-2026-54369	Nessus	Misc.	high

Detections

Analytics

CVE-2026-54369

high

Tenable Plugins

high

high

high

high