pymumu SmartDNS up to 47.1 SVBC Record Parser src/dns.c _dns_decode_rr_head/_dns_decode_SVCB_HTTPS stack-based overflow

Summaryinfo

A vulnerability identified as critical has been detected in pymumu SmartDNS up to 47.1. This issue affects the function _dns_decode_rr_head/_dns_decode_SVCB_HTTPS of the file src/dns.c of the component SVBC Record Parser. This manipulation causes stack-based overflow. This vulnerability is handled as CVE-2026-1425. The attack can be initiated remotely. There is not any exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability has been found in pymumu SmartDNS up to 47.1 and classified as critical. Affected by this vulnerability is the function _dns_decode_rr_head/_dns_decode_SVCB_HTTPS of the file src/dns.c of the component SVBC Record Parser. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-1425. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 296605 (Linux Distros Unpatched Vulnerability : CVE-2026-1425), which helps to determine the existence of the flaw in a target environment.

Applying the patch 2d57c4b4e1add9b4537aeb403f794a084727e1c8 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (296605). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.6
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 296605
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-1425

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 2d57c4b4e1add9b4537aeb403f794a084727e1c8

Timelineinfo

01/25/2026 Advisory disclosed
01/25/2026 +0 days VulDB entry created
01/26/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 2d57c4b4e1add9b4537aeb403f794a084727e1c8
Status: Confirmed

CVE: CVE-2026-1425 (🔒)
GCVE (CVE): GCVE-0-2026-1425
GCVE (VulDB): GCVE-100-342841

Entryinfo

Created: 01/25/2026 18:22
Updated: 01/26/2026 19:07
Changes: 01/25/2026 18:22 (57), 01/26/2026 10:21 (30), 01/26/2026 19:07 (2)
Complete: 🔍
Submitter: liloler
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #736827: pymumu smartdns 47.1 Stack-based Buffer Overflow (by liloler)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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