nsd: NSD version 4.14.0 introduced a bug where a specially crafted APL RR, with an adflength larger than permitted for the...
CVE-2026-12246 is fixed in nsd on 1 platform, first by nsd 4.14.0-1ubuntu0.1~esm1, released June 24, 2026. It is not reported as exploited. Patch Radar priority: High.
NSD version 4.14.0 introduced a bug where a specially crafted APL RR, with an adflength larger than permitted for the address family will overwrite the stack when the zone is written to disk, with a maximum of 111 attacker controlled bytes.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| nsd · Debian 14 | 4.14.3-1 | DEBIAN-CVE-2026-12246 | Jun 28, 2026 |
| nsd · Ubuntu 18.04.6 LTS (bionic) | 4.1.17-1ubuntu0.1~esm1 | nsd 4.1.17-1ubuntu0.1~esm1 | Jun 26, 2026 |
| nsd · Ubuntu 20.04 LTS (focal) | 4.1.26-1ubuntu0.1~esm1 | nsd 4.1.26-1ubuntu0.1~esm1 | Jun 26, 2026 |
| nsd · Ubuntu 22.04.1 LTS (jammy) | 4.3.9-1ubuntu0.1~esm1 | nsd 4.3.9-1ubuntu0.1~esm1 | Jun 26, 2026 |
| nsd · Ubuntu 24.04.5 LTS (noble) | 4.8.0-1ubuntu0.1~esm1 | nsd 4.8.0-1ubuntu0.1~esm1 | Jun 26, 2026 |
| nsd · Ubuntu 26.04.1 LTS (resolute) | 4.14.0-1ubuntu0.1~esm1 | nsd 4.14.0-1ubuntu0.1~esm1 | Jun 24, 2026 |
| nsd · opensuse-leap 16.0 | 4.14.3-bp160.1.1 | OPENSUSE-SU-2026:21502-1 | Jul 29, 2026 |
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