PT-2025-49603 · C-Ares+4 · C-Ares+4

Published 2025-12-08 · Updated 2026-05-12 · CVE-2025-62408

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions c-ares versions 1.32.3 through 1.34.5

Description c-ares is an asynchronous resolver library. Versions between 1.32.3 and 1.34.5 improperly handle query termination after maximum attempts when utilizing the read answer() and process answer() functions. This can lead to a Denial of Service. The issue stems from a use-after-free condition that could cause a crash or denial of service.

Recommendations Update to version 1.34.6 or later.

Exploit

Fix

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

AZL-71854

BDU:2026-07336

CVE-2025-62408

DSA-6084-1

GHSA-JQ53-42Q6-PQR5

OPENSUSE-SU-2026:10007-1

OPENSUSE-SU-2026:10029-1

OPENSUSE-SU-2026:20698-1

RHSA-2026:7414

SUSE-SU-2026:21574-1

SUSE-SU-2026:21584-1

USN-7925-1

Affected Products

Alt Linux

Debian

Red Os

Ubuntu

C-Ares

References · 33

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62408.json · Exploit
• https://github.com/c-ares/c-ares/commit/714bf5675c541bd1e668a8db8e67ce012651e618 · Patch
• https://github.com/c-ares/c-ares/security/advisories/GHSA-jq53-42q6-pqr5 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10007-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07336 · Security Note
• https://ubuntu.com/security/CVE-2025-62408 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-71854 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-62408 · Security Note
• https://osv.dev/vulnerability/CVE-2025-62408 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-62408 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-62408 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10029-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-62408 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2025-62408 · Vendor Advisory
• https://osv.dev/vulnerability/USN-7925-1 · Vendor Advisory