The vulnerability of the C-ares asynchronous DNS query library, related to the possibility of using memory after it is freed, allows a hacker to cause a service failure.

The vulnerability of the C-ares asynchronous DNS query library is related to the possibility of using memory after it is freed. Exploiting this vulnerability could allow a malicious actor to cause a service failure...

[SECURITY] Fedora 41 Update: c-ares-1.34.5-1.fc41

c-ares is a C library that performs DNS requests and name resolves asynchronously. c-ares is a fork of the library named 'ares', written by Greg Hudson at MIT...

Fedora 41 : c-ares (2025-c26ac54608)

The remote Fedora 41 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2025-c26ac54608 advisory. Update to 1.34.5. Fixes CVE-2025-31498. Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus ha...

c-ares has a use-after-free in read_answers()

...

[SECURITY] Fedora 42 Update: c-ares-1.34.5-1.fc42

c-ares is a C library that performs DNS requests and name resolves asynchronously. c-ares is a fork of the library named 'ares', written by Greg Hudson at MIT...

Linux Distros Unpatched Vulnerability : CVE-2025-31498

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in readanswers when processanswer may re-enqueue a query eithe...

Azure Linux 3.0 Security Update: c-ares / fluent-bit / grpc / nodejs (CVE-2023-31130)

The version of c-ares / fluent-bit / grpc / nodejs installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2023-31130 advisory. - c-ares is an asynchronous resolver library. aresinetnetpton is vulnerable to a...

OPENSUSE-SU-2025:14977-1 c-ares-devel-1.34.5-1.1 on GA media

These are all security issues fixed in the c-ares-devel-1.34.5-1.1 package on the GA media of openSUSE Tumbleweed...

Use After Free

Overview Affected versions of this package are vulnerable to Use After Free due to the readanswers process by flooding the target with ICMP UNREACHABLE packets under specific network conditions. Note: This is only exploitable remotely if the attacker also controls the upstream nameserver and can...

ALPINE-CVE-2025-31498

c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in readanswers when processanswer may re-enqueue a query either due to a DNS Cookie Failure or when the upstream server does not properly support EDNS, or possibly on TCP queries if the remote closed...

CVE-2025-31498

c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in readanswers when processanswer may re-enqueue a query either due to a DNS Cookie Failure or when the upstream server does not properly support EDNS, or possibly on TCP queries if the remote closed...

DEBIAN-CVE-2025-31498

c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in readanswers when processanswer may re-enqueue a query either due to a DNS Cookie Failure or when the upstream server does not properly support EDNS, or possibly on TCP queries if the remote closed...

CVE-2025-31498

c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in readanswers when processanswer may re-enqueue a query either due to a DNS Cookie Failure or when the upstream server does not properly support EDNS, or possibly on TCP queries if the remote closed...

CVE-2025-31498 c-ares has a use-after-free in read_answers()

c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in readanswers when processanswer may re-enqueue a query either due to a DNS Cookie Failure or when the upstream server does not properly support EDNS, or possibly on TCP queries if the remote closed...

CVE-2025-31498 c-ares has a use-after-free in read_answers()

c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in readanswers when processanswer may re-enqueue a query either due to a DNS Cookie Failure or when the upstream server does not properly support EDNS, or possibly on TCP queries if the remote closed...

CVE-2025-31498 c-ares has a use-after-free in read_answers()

c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in readanswers when processanswer may re-enqueue a query either due to a DNS Cookie Failure or when the upstream server does not properly support EDNS, or possibly on TCP queries if the remote closed...

CVE-2025-31498

CVE-2025-31498 (c-ares) affects versions 1.32.3–1.34.4 of the asynchronous resolver library. The issue is a use-after-free in read_answers() that can occur when process_answer() re-enqueues a query (e.g., due to DNS Cookie Failure or EDNS issues, or on TCP paths after a premature close). If an er...

CLSA-2025-1744116893 c-ares: Fix of CVE-2022-4904

CVE-2022-4904: fix missing checks in aressetsortlist to prevent possible stack overflow...

PT-2025-15436

Name of the Vulnerable Software and Affected Versions c-ares versions 1.32.3 through 1.34.4 Node.js versions prior to 22.15.0 Description A use-after-free vulnerability exists in the read answers function of c-ares, a library used for asynchronous DNS resolution. This occurs when process answer m...

c-ares 资源管理错误漏洞

c-ares is a C library for asynchronous DNS requests from the c-ares individual developer. A resource management error vulnerability exists in c-ares versions 1.32.3 through 1.34.4, which stems from reuse after release and could lead to a denial of service triggered by a remote attacker...