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

EPSS Score

0.45% (percentile: 37.8%)

Affected Products (2)

Other

• 21260-17084
• 21671-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-05: Information published.