CVE-2026-101339

Stack overwrite from a specially crafted and formatted HIP RR

HIGH
8.7
CVSS Score
Published: October 14, 2026 at 10:56 AM UTC
Updated: October 16, 2026 at 07:55 PM UTC
1 product affected across 1 vendorNsd

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Severity
HIGH8.7
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

A HIP resource record that fills the RDATA near or at is limit, and has another dname RDATA field (a HIP Rendezvous server) can overwrite the stack with up to 191 bytes of attacker controlled data. Zone files which are written out by NSD itself, such as for zones for which the NSD instance is secondary, will not be formatted like this. The zone file must be fed to NSD directly, (but it could come, for example, from an operator controlled provisioning system).

Affected

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

Remediation

No guide yet

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

References (1)

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

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

CVSS

8.7HIGHNLnet Labs
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-121

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