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

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CVE-2026-33630

c-ares , an asynchronous DNS resolver library, is affected by a use-after-free / double-free in its query-completion handling, present from version 1.32.3 through 1.34.6 and fixed in 1.34.7 . The flaw occurs when a query's callback is invoked while the query is still linked in the channel's inter...

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

c-ares is an asynchronous resolver library. From ver 1.32.3 until 1.34.7, a use-after-free / double-free in c-ares' query-completion handling. The same flaw — a query's callback being invoked while the query is still linked in the channel's internal lookup structures — is present at multiple poin...

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

c-ares is an asynchronous resolver library. From ver 1.32.3 until 1.34.7, a use-after-free / double-free in c-ares' query-completion handling. The same flaw — a query's callback being invoked while the query is still linked in the channel's internal lookup structures — is present at multiple poin...

openSUSE 16 Security Update : c-ares (openSUSE-SU-2026:21721-1)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21721-1 advisory. Updat to c-ares 1.36.8. - CVE-2026-33630: remotely triggerable use-after-free/double-free in query-completion handling via aresgetaddrinfo over...

OPENSUSE-SU-2026:21721-1 Security update for c-ares

This update for c-ares fixes the following issues: Updat to c-ares 1.36.8. - CVE-2026-33630: remotely triggerable use-after-free/double-free in query-completion handling via aresgetaddrinfo over TCP bsc1270416. - CVE-2026-69184: CPU exhaustion denial of service via unbounded DNS name compression...

Updated c-ares packages fix security vulnerabilities

Use-after-free / double-free in c-ares query-completion handling, remotely triggerable via aresgetaddrinfo over TCP. CVE-2026-33630 CPU-exhaustion denial of service via unbounded DNS name compression pointer chains. CVE-2026-69184 Memory-amplification denial of service via unvalidated DNS header...

MGASA-2026-0343 Updated c-ares packages fix security vulnerabilities

Use-after-free / double-free in c-ares query-completion handling, remotely triggerable via aresgetaddrinfo over TCP. CVE-2026-33630 CPU-exhaustion denial of service via unbounded DNS name compression pointer chains. CVE-2026-69184 Memory-amplification denial of service via unvalidated DNS header...

EulerOS Virtualization 2.9.0 : c-ares (EulerOS-SA-2022-2375)

According to the versions of the c-ares package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - A possible use-after-free and double-free in c-ares lib version 1.16.0 if aresdestroy is called prior to aresgetaddrinfo completin...

EulerOS 2.0 SP9 : c-ares (EulerOS-SA-2022-1959)

According to the versions of the c-ares package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - A possible use-after-free and double-free in c-ares lib version 1.16.0 if aresdestroy is called prior to aresgetaddrinfo completing. This flaw...

SUSE: Security Advisory (SUSE-SU-2021:2760-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2021 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

CVE-2020-14354

A possible use-after-free and double-free in c-ares lib version 1.16.0 if aresdestroy is called prior to aresgetaddrinfo completing. This flaw possibly allows an attacker to crash the service that uses c-ares lib. The highest threat from this vulnerability is to this service availability...

DEBIAN-CVE-2020-14354

A possible use-after-free and double-free in c-ares lib version 1.16.0 if aresdestroy is called prior to aresgetaddrinfo completing. This flaw possibly allows an attacker to crash the service that uses c-ares lib. The highest threat from this vulnerability is to this service availability...

Double free

A possible use-after-free and double-free in c-ares lib version 1.16.0 if aresdestroy is called prior to aresgetaddrinfo completing. This flaw possibly allows an attacker to crash the service that uses c-ares lib. The highest threat from this vulnerability is to this service availability...

c-ares 1.16.0 Use-After-Free Exploit

c-ares version 1.16.0 has an issue where aresdestroy with pending aresgetaddrinfo leads to a use-after-free condition. c-ares 1.16.0: aresdestroy with pending aresgetaddrinfo leads to use-after-free The following code was introduced in c-ares commit dbd4c441 first released in 1.16.0, which was...