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CVE-2025-62408

Good to know:

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Date: December 8, 2025

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 Score

Related Resources (4)

https://github.com/c-ares/c-ares/commit/714bf5675c541bd1e668a8db8e67ce012651e618
https://nvd.nist.gov/vuln/detail/CVE-2025-62408
https://github.com/c-ares/c-ares/security/advisories/GHSA-jq53-42q6-pqr5
https://www.mend.io/vulnerability-database/CVE-2025-62408

Severity Score

Weakness Type (CWE)

Use After Free

CWE-416

Top Fix

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Upgrade Version

Upgrade to version https://github.com/c-ares/c-ares.git - v1.34.6

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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