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3.6 Low

CVE-2026-17591 Libarchive: libarchive: use-after-free via aliased mac metadata copy

Description

A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.

CVSS 3.1 detail

Vector CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L

Exploitable with local access to the machine, without an account and if a user takes an action; the impact on data or service is limited.

Attack vector
Local
Attack complexity
High
Privileges required
None
Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
Low

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 Versions not published
Red Hat Enterprise Linux 9 Versions not published
Red Hat Hardened Images 3.8 earliest → < 3.8.9-2.1.hum1 3.8.9-2.1.hum1
Red Hat OpenShift AI (RHOAI) Versions not published

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