CVE-2026-1425 json
pymumu SmartDNS SVBC Record dns.c _dns_decode_SVCB_HTTPS stack-based overflow
published 2026-01-26 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-4706
- cvss
- 5.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 34%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- smartdns Debian 13 46.1+dfsg-1.1~deb13u1
- smartdns Debian 14 46.1+dfsg-1.1
debian advisories DEBIAN-CVE-2026-1425
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 9 mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.3 | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X |
| CNA | 3.1 | 5.6 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C |
| CNA | 3.0 | 5.6 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C |
| CNA | 2.0 | 5.1 | AV:N/AC:H/Au:N/C:P/I:P/A:P/E:ND/RL:OF/RC:C |
| CNA | 4.0 | 6.3 | CVSS:4.0/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 |
| CNA | 3.1 | 5.6 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L |
| CNA | 2.0 | 5.1 | AV:N/AC:H/Au:N/C:P/I:P/A:P |
Affected products
- pymumu SmartDNS
Classification
References
-
github.com
/pymumu/smartdns/commit/2d57c4b4e1add9b4537aeb403f794a084727e1c8
patch
-
vuldb.com
/?id.342841
vdb-entry, technical-description
-
vuldb.com
/?ctiid.342841
signature, permissions-required
-
vuldb.com
/?submit.736827
third-party-advisory
-
github.com
/pymumu/smartdns/
product
Sources
- CVE List CVE-2026-1425
- NVD CVE-2026-1425
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.