# CVE-2026-1425: smartdns: A security flaw has been discovered in pymumu SmartDNS up to 47.1

CVE-2026-1425 is fixed in smartdns on 1 platform, first by DEBIAN-CVE-2026-1425, released January 26, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-1425
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0040
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 26, 2026

## Description

A security flaw has been discovered in pymumu SmartDNS up to 47.1. This vulnerability affects the function _dns_decode_rr_head/_dns_decode_SVCB_HTTPS of the file src/dns.c of the component SVBC Record Parser. The manipulation results in stack-based buffer overflow. It is possible to launch the attack remotely. A high complexity level is associated with this attack. It is stated that the exploitability is difficult. The patch is identified as 2d57c4b4e1add9b4537aeb403f794a084727e1c8. Applying a patch is advised to resolve this issue.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | smartdns Debian 13.5 (trixie) | 46.1+dfsg-1.1~deb13u1 | [DEBIAN-CVE-2026-1425](https://patchblox.com/security/data/fix/linux/debian-cve-2026-1425.md) | Jan 26, 2026 |
| Linux | smartdns Debian 14 | 46.1+dfsg-1.1 | [DEBIAN-CVE-2026-1425](https://patchblox.com/security/data/fix/linux/debian-cve-2026-1425.md) | Jan 26, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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