Unrated severityNVD Advisory· Published Dec 8, 2025· Updated Dec 9, 2025
c-ares has a Use After Free vulnerability when connection is cleaned up after error
CVE-2025-62408
Description
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 products
2- c-ares/c-aresv5Range: > 1.32.3, < 1.34.6
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- github.com/c-ares/c-ares/commit/714bf5675c541bd1e668a8db8e67ce012651e618mitrex_refsource_MISC
- github.com/c-ares/c-ares/security/advisories/GHSA-jq53-42q6-pqr5mitrex_refsource_CONFIRM
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