CVE catalog
CVE-2026-12244
If NSD is configured as secondary for a zone, the primary of that zone can crash NSD with an AXFR containing a DNS message with a special crafted SVCB RR with an rdata size of 65512, that let's an (ui
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.49% · Oct 25, 2026
If NSD is configured as secondary for a zone, the primary of that zone can crash NSD with an AXFR containing a DNS message with a special crafted SVCB RR with an rdata size of 65512, that let's an (uint16_t) variable that is used to allocate space needed for the RR wrap (because total size > 65535), causing a heap overflow. The attacker can perform a controlled (RCE class) head write of up to 65509 bytes
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | nsd | sid | 4.15.4-1 | fixed |
| Debian | nsd | forky | 4.15.4-1 | fixed |
| Debian | nsd | trixie | 4.12.0-1 | not affected |
| Debian | nsd | bookworm | 4.6.1-1 | not affected |
| Cpe | nsd | Not reported | 4.8.0-1ubuntu0.1~esm1 | fixed |
| Cpe | nsd | Not reported | 4.14.3 | fixed |
| Alpine | nsd | 3.24 | 4.14.3-r0 | fixed |
| Opensuse | nsd | leap 16.0 | 4.14.3-bp160.1.1 | fixed |
| Opensuse | nsd | tumbleweed | 4.14.3-1.1 | fixed |
| Ubuntu | nsd | pro | 4.12.0-1 | vulnerable |
| Ubuntu | nsd | pro | 4.13.0-6 | vulnerable |
| Ubuntu | nsd | pro | 4.14.0-1 | vulnerable |
| Ubuntu | nsd | pro | 4.14.0-1ubuntu0.1~esm1 | fixed |
| Cpe | nsd | Not reported | 4.14.3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | nsd | source | sid | 4.14.3-1 | not yet assigned | Not reported | Not reported |
| Debian | nsd | source | forky | 4.14.3-1 | not yet assigned | Not reported | Not reported |
| Debian | nsd | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | nsd | source | bookworm | Not affected | unimportant | Not reported | Not reported |
| Cpe | nsd | cpe | Not reported | 4.8.0-1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Cpe | nsd | cpe | Not reported | 4.14.3 | Not reported | Not reported | Not reported |
| Alpine | nsd | apk | 3.24 | 4.14.3-r0 | Not reported | ALPINE-CVE-2026-12244 | Not reported |
| Opensuse | nsd | rpm | leap 16.0 | 4.14.3-bp160.1.1 | Not reported | OPENSUSE-SU-2026:21502-1 | Not reported |
| Opensuse | nsd | rpm | tumbleweed | 4.14.3-1.1 | Not reported | OPENSUSE-SU-2026:11395-1 | Not reported |
| Ubuntu | nsd | deb | pro | 4.14.0-1ubuntu0.1~esm1 | Not reported | USN-8474-1 | Not reported |
| Cpe | nsd | cpe | Not reported | 4.14.3 | Not reported | NVD-CVE-2026-12244 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [nsd]Not affected
Details (2)
4.6.1-1· amd64 · bookwormNot affected
nvd · nsd · debian · bookworm
4.6.1-1· arm64 · bookwormNot affected
nvd · nsd · debian · bookworm
[openSUSE Tumbleweed]
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11395-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-12244]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-12244]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-12244]
- [https://osv.dev/vulnerability/USN-8474-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11395-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:21502-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-12244]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12244.json]
- [https://ubuntu.com/security/notices/USN-8474-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3663.json]
- [https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12244.txt]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]