PT-2026-4730 · Unknown · Pymumu Smartdns

Liloler · Published 2026-01-01 · Updated 2026-01-26 · CVE-2026-1425

Positive Technologies (AI Summary)

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions pymumu SmartDNS versions through 47.1

Description A security flaw exists in pymumu SmartDNS related to the SVBC Record Parser component, specifically within the dns decode rr head/ dns decode SVCB HTTPS function located in the src/dns.c file. This issue results in a stack-based buffer overflow and can be exploited remotely. The exploitability is considered difficult and requires a high level of complexity.

Recommendations Apply patch 2d57c4b4e1add9b4537aeb403f794a084727e1c8 to resolve this vulnerability.

Fix

Stack Overflow

Buffer Overflow

Weakness Enumeration

CWE-121

CWE-119

Related Identifiers

CVE-2026-1425

Affected Products

Pymumu Smartdns

References · 16

• https://github.com/pymumu/smartdns/commit/2d57c4b4e1add9b4537aeb403f794a084727e1c8 · Patch
• https://cve.org/CVERecord?id=CVE-2026-1425 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-1425 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-1425 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-1425 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-1425 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-1425 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-1425 · Vendor Advisory
• https://vuldb.com/?id.342841 · Note
• https://twitter.com/VulmonFeeds/status/2015708361526759516 · Twitter Post
• https://github.com/pymumu/smartdns · Note
• https://vuldb.com/?ctiid.342841 · Note
• https://t.me/cveNotify/149835 · Telegram Post
• https://twitter.com/vuldb/status/2015741150435623220 · Twitter Post
• https://twitter.com/CVEnew/status/2015695229299429454 · Twitter Post