What’s Vulnerable › Vulnerabilities
CVE-2026-12246: Out of bounds stack write with crafted APL RR
- Severity: high (CVSS 8.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-25 · updated 2026-10-25
- Weakness: CWE-20
Description
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.
Affected products
- NLnet Labs NSD: from 4.14.0 before 4.14.3 — fixed in 4.14.3
How to fix
Upgrade to a fixed version: NLnet Labs NSD 4.14.3. Check the vendor advisory for mitigations.
References
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