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CVE-2026-12246

Out of bounds stack write with crafted APL RR

HIGH
8.1
CVSS Score
Published: June 25, 2026 at 05:24 AM UTC
Updated: October 25, 2026 at 11:10 PM UTC
1 product affected across 1 vendorNsd

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Severity
HIGH8.1
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nsd· Nlnetlabs
95%
4.14.0 ≤ v < 4.14.34.14.0
Affected range stops below 4.14.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12246.txt

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-120CWE-20

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