CVE-2026-63209: Integer Overflow or Wraparound and Out-of-bounds Write in compress

Overview

Severity

High (CVSS 7.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-10-03

EPSS Score

0.36% (percentile: 28.0%)

Affected Products (2)

Other

• 21904-17084
• 21903-17084

Revision History

• 2026-10-03: Information published.