CVE-2016-10142: An issue was discovered in the IPv6 protocol specification, related to ICMP Packet Too Big (PTB) messages

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HIGH 8.6REMOTEMITIGATE

CVE-2016-10142 is a high-severity flaw (CVSS 8.6) affecting ipv6. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the IPv6 protocol specification, related to ICMP Packet Too Big (PTB) messages. (The scope of this CVE is all affected IPv6 implementations from all vendors.) The security implications of IP fragmentation have been discussed at length in [RFC6274] and [RFC7739]. An attacker can leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow (in scenarios in which actual fra

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.8% (top 14%)
CISA exploited list	No
Weakness	CWE-17
Published	2017-01-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ietf

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-01-14 07:59 UTCPublished CVE record published
2026-06-17 00:39 UTCUpdated Record last modified

ietf ipv6 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ipv6 || rpm -q ipv6 || ipv6 --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2016-10142?

ipv6: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2016-10142 being exploited?

CVE-2016-10142 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2016-10142 affect?

CVE-2016-10142 affects ipv6. Severity is high (CVSS 8.6). An issue was discovered in the IPv6 protocol specification, related to ICMP Packet Too Big (PTB) messages. (The scope of this CVE is all affected IPv6 implementations from all vendors.) The security implications of IP fragmentation have bee

How urgent is CVE-2016-10142?

Priority 57/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-23019 MEDIUM 5.4 MITIGATE IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interfa
CVE-2025-23018 MEDIUM 5.4 MITIGATE IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification of the source
CVE-2020-27338 MEDIUM 5.9 UPGRADE An issue was discovered in Treck IPv6 before 6.0.1.68
CVE-2020-27337 HIGH 7.3 UPGRADE An issue was discovered in Treck IPv6 before 6.0.1.68
CVE-2020-27336 LOW 3.7 UPGRADE An issue was discovered in Treck IPv6 before 6.0.1.68

References

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