CVE-2026-5745

| EUVD-2026-19705 MEDIUM
2026-04-07 redhat GHSA-fjqv-vj6q-4fcm
5.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
Analysis Generated
Apr 07, 2026 - 15:30 vuln.today
EUVD ID Assigned
Apr 07, 2026 - 15:30 euvd
EUVD-2026-19705
CVE Published
Apr 07, 2026 - 14:57 nvd
MEDIUM 5.5

Tags

Denial Of Service Null Pointer Dereference

Description

A flaw was found in libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically within the archive_acl_from_text_nl() function. When processing a malformed ACL string (such as a bare "d" or "default" tag without subsequent fields), the function fails to perform adequate validation before advancing the pointer. An attacker can exploit this by providing a maliciously crafted archive, causing an application utilizing the libarchive API (such as bsdtar) to crash, resulting in a Denial of Service (DoS).

Analysis

Libarchive's archive_acl_from_text_nl() function fails to validate malformed ACL strings before dereferencing pointers, allowing local attackers to crash applications that process untrusted archives via specially crafted ACL fields. This NULL pointer dereference results in denial of service with high availability impact. …

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Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +28
POC: 0

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CVE-2026-5745 vulnerability details – vuln.today
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