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CVE-2025-62408

22
FAUCET Score

CVE-2025-62408 describes a Denial of Service vulnerability in the c-ares asynchronous resolver library, affecting versions 1.32.3 through 1.34.5. The flaw arises when the library terminates a query after maximum attempts during read_answer() and process_answer() operations, leading to service disruption. Rated as MEDIUM severity (CVSS 5.9), this vulnerability can be exploited remotely with high attack complexity, resulting in a high impact on availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.32.3, < 1.34.6CPE matchmatch criteria
cpe:2.3:a:c-ares:c-ares:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
33.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 4th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (17)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: azl3 fluent-bit 3.1.10-4 on Azure Linux 3.0Fixed in: 3.1.10-4
microsoftpatch availablevia msrc
Product: 20735-17084Fixed in: 3.1.10-4
microsoftpatch availablevia msrc
Product: 20802-17084Fixed in: 3.1.10-4
microsoftpatch availablevia msrc
Product: azl3 fluent-bit 3.1.10-2 on Azure Linux 3.0Fixed in: 3.1.10-4
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:20/nodejs
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:22/nodejs
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:24/nodejs
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: c-ares
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: nodejs:20/nodejs
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: nodejs:22/nodejs
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: nodejs:24/nodejs
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: rhcos
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: c-ares
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: nodejs22
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: nodejs24
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: c-ares

Vendor Advisories (2)

microsoft2025-Dec/CVE-2025-62408Moderate

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

Dec 9, 2025
redhatCVE-2025-62408Moderate

c-ares: c-ares: Denial of Service due to query termination after maximum attempts

Dec 8, 2025

References

github.com / c-ares/c-ares/commit/714bf5675c541bd1e668a8db8e67ce012651e618
Patch
github.com / c-ares/c-ares/security/advisories/GHSA-jq53-42q6-pqr5
PatchVendor Advisory