CVE-2025-62408
Published: December 10, 2025Last modified: February 18, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.9 |
| Attack Vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | c-ares | Not affected (1.18.1-r1) |
| 25 LTS | c-ares | Fixed (1.34.6-r0) | |
| Stream | c-ares | Fixed (1.34.6-r0) | |
| Hardened Containers | 25 LTS | c-ares | Fixed (1.34.6-r0) |
| Stream | c-ares | Fixed (1.34.6-r0) |