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

Overview

Severity

Low (CVSS 3.6)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Oct

Released

2026-10-21

EPSS Score

0.11% (percentile: 1.2%)

Affected Products (2)

Other

• 21708-17084
• 21678-17084

Revision History

• 2026-10-21: Information published.