CVE-2026-54369 (GCVE-0-2026-54369)

Vulnerability from cvelistv5 – Published: 2026-06-29 12:37 – Updated: 2026-07-28 12:04 X_Open Source Unsupported When Assigned
VLAI
Title
acl < 2.4.0 Symlink Traversal Privilege Escalation via libacl Functions
Summary
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.
Severity
8.4 (High)
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
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
Impacted products
Vendor Product Version
acl project acl Affected: 0 , < 2.4.0 (semver)
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Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:2.4.0-1.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:2.4.0-1.el8_10 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:2.4.0-1.el9_8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
    cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat Discovery 2 Unaffected: 1784821670 , < * (rpm)
    cpe:/a:redhat:discovery:2::el9
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Red Hat Red Hat Discovery 2 Unaffected: 1784821750 , < * (rpm)
    cpe:/a:redhat:discovery:2::el9
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Red Hat Red Hat Hardened Images Unaffected: 2.4.0-0.1.hum1 , < * (rpm)
    cpe:/a:redhat:hummingbird:1
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Red Hat Red Hat Update Infrastructure 5 Unaffected: 1784794818 , < * (rpm)
    cpe:/a:redhat:rhui:5::el9
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Red Hat Red Hat Update Infrastructure 5 Unaffected: 1784794778 , < * (rpm)
    cpe:/a:redhat:rhui:5::el9
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Red Hat Red Hat Update Infrastructure 5 Unaffected: 1784795112 , < * (rpm)
    cpe:/a:redhat:rhui:5::el9
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Red Hat Red Hat Update Infrastructure 5 Unaffected: 1784794289 , < * (rpm)
    cpe:/a:redhat:rhui:5::el9
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Red Hat Red Hat Update Infrastructure 5 Unaffected: 1784795076 , < * (rpm)
    cpe:/a:redhat:rhui:5::el9
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
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Date Public
2026-06-29 00:00
Credits
Andrew Tridgell Andreas Gruenbacher
Show details on NVD website
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}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.