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No exploitation reportedFix available

CVE-2026-54369

No exploitation reported by the sources we read.

  • Published2026-06-29
  • WeaknessCWE-59

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-06-2914:16CVE publishedNVD

Versions per branch

Products declared by the CNA1 product

As VulnCheck, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-07-14

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • aclUbuntu:26.04:LTSall versions · no fixed version listed
  • aclUbuntu:25.10all versions · no fixed version listed
  • aclUbuntu:24.04:LTSall versions · no fixed version listed
  • aclUbuntu:22.04:LTSall versions · no fixed version listed
  • aclUbuntu:20.04:LTSall versions · no fixed version listed
  • aclUbuntu:18.04:LTSall versions · no fixed version listed
  • aclUbuntu:16.04:LTSall versions · no fixed version listed
  • aclUbuntu:14.04:LTSall versions · no fixed version listed

92 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-54369 Red Hat Product Security487 products fixed · 7 known affected

    acl: Symlink traversal privilege escalation via libacl functions

    acl.src as a component of Red Hat Enterprise Linux 6 · libacl as a component of Red Hat Enterprise Linux 6 · libacl-devel as a component of Red Hat Enterprise Linux 6 · +4 more

  • RHSA-2026:92452 Red Hat Product Security7 products fixed

    Red Hat Security Advisory: Red Hat Enterprise Linux AI 3.5.2 enhancement update

  • RHSA-2026:92449 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Enterprise Linux AI 3.5.2 enhancement update

  • RHSA-2026:90272 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.12.102 bug fix and security update

  • RHSA-2026:89725 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.18.59 bug fix and security update

  • RHSA-2026:82811 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.15.70 bug fix and security update

88 more advisories

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2026:92452 · 7 productsThe container images provided by this update can be downloaded from the Red Hat container registry at registry.redhat.io using the "podman pull" command. For details on deploying and configuring RHEL AI, see the Red Hat Enterprise Linux AI documentation at https://docs.redhat.com/en/documentation/…
  2. Vendor fix Red Hat Product Security RHSA-2026:92449 · 1 productThe container disk images provided by this update can be downloaded from the Red Hat container registry at registry.redhat.io using the "podman pull" command, for use with OpenShift Virtualization. For details on deploying and configuring RHEL AI, see the Red Hat Enterprise Linux AI documentation …
  3. Vendor fix Red Hat Product Security RHSA-2026:90272 · 1 productFor OpenShift Container Platform 4.12 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  4. Vendor fix Red Hat Product Security RHSA-2026:89725 · 4 productsFor OpenShift Container Platform 4.18 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  5. Vendor fix Red Hat Product Security RHSA-2026:82811 · 4 productsFor OpenShift Container Platform 4.15 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  6. Vendor fix Red Hat Product Security RHSA-2026:77320 · 1 productFor OpenShift Container Platform 4.13 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS 4.0 vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-06-29
Last Modified
2026-10-25
NVD status
Deferred
MSRC Title
acl < 2.4.0 Symlink Traversal Privilege Escalation via libacl Functions
GitHub Advisory
GHSA-53ch-pxc8-6g72

Frequently asked questions

What is CVE-2026-54369?

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.

Is CVE-2026-54369 actively exploited?

Active exploitation of CVE-2026-54369 has not been confirmed. Its EPSS score was 0.2% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-54369?

CVE-2026-54369 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

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