CVE & CISA-KEV Catalog

CVE-2026-10846

HIGH
7.5
CVSS v3
NVD

Description

NLnet Labs ldns 1.2.0 up to and including versions 1.9.0, when used in applications as (stub) resolver over UDP, lacks matching the query destination address and port with the response source address and port. Furthermore not the query ID, neither the question of the query is matched with that of the response. This makes applications, that use ldns for (stub) resolver functionality over UDP, vulnerable for off-path poisoning attacks. The drill tool, which is shipped with ldns, suffers from this vulnerability.

CWE-346

How to fix

Remediation Available
ldnsDebian
Fixed in:1.9.2-1CVE-2026-10846
ldnsUbuntu
Fixed in:1.6.17-8ubuntu0.1+esm2USN-8449-1
Fixed in:1.7.0-3ubuntu4.1+esm1USN-8449-1
Fixed in:1.7.0-4.1ubuntu1+esm2USN-8449-1
Fixed in:1.7.1-2ubuntu4+esm2USN-8449-1
Fixed in:1.8.3-2ubuntu0.1~esm1USN-8449-1
ldnsutilsUbuntu
Fixed in:1.6.17-8ubuntu0.1+esm2USN-8449-1
Fixed in:1.7.0-3ubuntu4.1+esm1USN-8449-1
Fixed in:1.7.0-4.1ubuntu1+esm2USN-8449-1
Fixed in:1.7.1-2ubuntu4+esm2USN-8449-1
Fixed in:1.8.3-2ubuntu0.1~esm1USN-8449-1
libldns1Ubuntu
Fixed in:1.6.17-8ubuntu0.1+esm2USN-8449-1
libldns2Ubuntu
Fixed in:1.7.0-3ubuntu4.1+esm1USN-8449-1
Fixed in:1.7.0-4.1ubuntu1+esm2USN-8449-1
libldns3Ubuntu
Fixed in:1.7.1-2ubuntu4+esm2USN-8449-1
libldns3t64Ubuntu
Fixed in:1.8.3-2ubuntu0.1~esm1USN-8449-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityHigh
AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

0.15%probability of exploitation in 30 days
4thpercentile

Low risk: more likely to be exploited than 4% of all known CVEs.

References

Vendor Advisory1
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Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.