CVE-2026-18477: Tar: tar: toctou in incremental dumpdir 'x' rename handling allows restore path escape

Overview

Severity

Medium (CVSS 4.4)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Aug

Released

2026-08-07

Last Updated

2026-09-13

EPSS Score

0.08% (percentile: 0.2%)

Affected Products (1)

Other

• 20131-17084

Security Updates (1)

• Security Update

Revision History

• 2026-08-07: Information published.
• 2026-09-13: Information published.