---
id: CVE-2025-62408
title: c-ares is an asynchronous resolver library
summary: >-
  c-ares is an asynchronous resolver library. Versions 1.32.3 through 1.34.5 
  terminate a query after maximum attempts when using read_answer() and
  process_answer(), which can cause a Denial of Service. This issue is fixed in
  version 1.34.6.
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-416
vendor: c-ares
product: c-ares
affected:
  - 'c-ares >= 1.32.3, < 1.34.6'
patched:
  - c-ares 1.34.6
published: '2025-12-08'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T22:10:00.210'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-62408'
references:
  - url: >-
      https://github.com/c-ares/c-ares/commit/714bf5675c541bd1e668a8db8e67ce012651e618
    label: security-advisories@github.com
  - url: 'https://github.com/c-ares/c-ares/security/advisories/GHSA-jq53-42q6-pqr5'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00427
epssPercentile: 0.35352
ingestedAt: '2026-10-14T23:00:02.028Z'
---

## Overview

c-ares is an asynchronous resolver library. Versions 1.32.3 through 1.34.5  terminate a query after maximum attempts when using read_answer() and process_answer(), which can cause a Denial of Service. This issue is fixed in version 1.34.6.

## Affected

- `c-ares >= 1.32.3, < 1.34.6`

## Remediation

Upgrade past the affected range:

- `c-ares 1.34.6`