CVE-2026-54369
High
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.
SeverityHigh
CVSS7.1
Exploit probability—
ProductAcl
PublishedJun 29, 2026
First seenJun 29, 2026
Weakness typeCWE-59Improper link resolution
How to fix
Update
- acl project acl2.4.0 or later
Patches
Vendor advisories
- access.redhat.com/errata/RHSA-2026:54769
- access.redhat.com/errata/RHSA-2026:64805
- access.redhat.com/errata/RHSA-2026:42739
- access.redhat.com/errata/RHSA-2026:67142
- access.redhat.com/errata/RHSA-2026:67144
- access.redhat.com/errata/RHSA-2026:67140
- access.redhat.com/errata/RHSA-2026:42736
- access.redhat.com/errata/RHSA-2026:43420
- access.redhat.com/errata/RHSA-2026:46836
- access.redhat.com/errata/RHSA-2026:34351
- access.redhat.com/errata/RHSA-2026:53371
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| acl project acl | v < 2.4.0 | 2.4.0 |
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