Bug 2494174

Summary:	CVE-2026-54369 acl: Symlink traversal privilege escalation via libacl functions [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Mauro Matteo Cascella <mcascell>
Component:	acl	Assignee:	Lukáš Zaoral <lzaoral>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	jamartis, kdudka, lzaoral, pcahyna, steved, traffic.bpk
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["8814fa3e-5225-4ca9-a296-102c69901ba6"]}
Fixed In Version:	acl-2.4.0-1.fc45 acl-2.4.0-1.fc44	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-07-11 01:11:57 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2490277

Description Mauro Matteo Cascella 2026-06-29 13:16:43 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.

Comment 1 Lukáš Zaoral 2026-07-09 08:41:56 UTC

FEDORA-2026-a948378fff (acl-2.4.0-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-a948378fff

Comment 2 Fedora Update System 2026-07-09 08:50:39 UTC

FEDORA-2026-67504c329b (acl-2.4.0-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-67504c329b

Comment 3 Fedora Update System 2026-07-09 08:50:43 UTC

FEDORA-2026-6b9a652463 (acl-2.4.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-6b9a652463

Comment 4 Fedora Update System 2026-07-10 01:27:26 UTC

FEDORA-2026-6b9a652463 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-6b9a652463`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-6b9a652463

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-07-10 01:44:02 UTC

FEDORA-2026-67504c329b has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-67504c329b`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-67504c329b

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2026-07-11 01:11:57 UTC

FEDORA-2026-6b9a652463 (acl-2.4.0-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.