Use After Free Affecting c-ares package, versions <1.34.6-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.43% (36th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-CARES-14222430
  • published9 Dec 2025
  • disclosed8 Dec 2025

Introduced: 8 Dec 2025

CVE-2025-62408  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:unstable c-ares to version 1.34.6-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream c-ares package and not the c-ares package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1