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Vulnerability Intelligence

CVE-2025-62408

MEDIUM5.9

c-ares has a Use After Free vulnerability when connection is cleaned up after error

Published Dec 8, 2025

Modified 1 months ago

No fix available

Details

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.

References

WEBhttps://github.com/c-ares/c-ares/commit/714bf5675c541bd1e668a8db8e67ce012651e618 WEBhttps://github.com/c-ares/c-ares/security/advisories/GHSA-jq53-42q6-pqr5 ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2025-62408

CVSS Analysis

CVSS v3.1

5.9

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

HighAC:H

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

5.9/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

Memory Safety

Ecosystems

Timeline

PublishedDec 8, 2025

ModifiedDec 9, 2025

CVE-2025-62408 | Mondoo Vulnerability Intelligence