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CVE-2023-31470

29
FAUCET Score

CVE-2023-31470 is a critical out-of-bounds write vulnerability affecting SmartDNS versions through 41 before 56d0332, specifically within the _dns_encode_domain function in dns.c. This flaw allows an unauthenticated attacker to achieve remote code execution and full system compromise via a crafted DNS request, as indicated by its CVSS score of 9.8. Despite its severe impact, there is currently no evidence of active exploitation, public exploit code, or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 41CPE matchmatch criteria
cpe:2.3:a:pymumu:smartdns:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.12%
Probability of exploitation in next 30 days
EPSS Percentile
62.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0112 is in the 48th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / pymumu/smartdns/commit/56d0332bf91104cfc877635f6c82e9348587df04
Patch
github.com / pymumu/smartdns/issues/1378
Exploit