CVE-2026-33630: c-ares : Use-after-free / double-free in c-ares query-completion handling, remotely triggerable via ares_getaddrinfo() over TCP

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

2026-09-05

Last Updated

2026-09-19

EPSS Score

0.84% (percentile: 57.6%)

Affected Products (1)

Other

• 21260-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-05: Information published.
• 2026-09-09: Information published.
• 2026-09-18: Information published.
• 2026-09-19: Information published.