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CVE-2026-54370

MEDIUM
6.3
CVSS 3.1
Description
acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability that allows local attackers to escalate privileges by replacing a pathname component with a symbolic link between an lstat() check and subsequent symlink-following operations such as stat(), chown(), chmod(), acl_get_file(), and acl_set_file(). Attackers who control a pathname component can redirect file access control list operations to arbitrary files when getfacl, setfacl, or chacl is invoked by a privileged process over an attacker-controlled path, resulting in local privilege escalation.

Metadata

CVE ID
CVE-2026-54370
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-12 20:20 UTC
Published
2026-06-29 12:38 UTC
Last updated
2026-06-29 14:51 UTC
Primary CWE
CWE-367
Time-of-check Time-of-use (TOCTOU) Race Condition
Vendor / Product
acl project / acl
Sources
cve.org  ·  NVD

Severity & Metrics

6.3 MEDIUM CVSS 3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
acl project acl — 0 < 2.4.0
Weakness (CWE)
CWESourceDescription
CWE-367 cna Time-of-check Time-of-use (TOCTOU) Race Condition
CVSS scores (2)
ScoreSeverityVersionSourceVector
7.2 HIGH 4.0 cna CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
6.3 MEDIUM 3.1 cna CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
References (3)
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