CVE-2026-12246

Out of bounds stack write with crafted APL RR

CVSS 7.2 HIGHEPSS 0.3%CWE-120 CWE-20

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

NLnet Labs · NSD

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References

https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12246.txt