CVE-2011-2391

6.1 MEDIUM 1% exploit odds Fix listed

What it is

The IPv6 implementation in the kernel in Apple iOS before 7 allows remote attackers to cause a denial of service (CPU consumption) via crafted ICMPv6 packets.

At a glance

Exploitability: Can be exploited from the same network segment without logging in. High risk of service disruption.
Exploit odds: 1.2% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2013-09-19 10:27 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:31 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 1.2% in the next 30 days (EPSS).
Severity: 6.1 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2013-09-19 10:27 UTC
Last modified: 2026-06-16 23:31 UTC
Exploit probability: 1.2% · EPSS, next 30 days
Weakness: CWE-20 · Improper input validation
Record status: Modified

Affected

Apple Mac Os X ≤ 10.9.5
Apple Itunes ≤ 12.1
Apple Iphone Os ≤ 6.1.4
Apple Iphone Os 1.0.0
Apple Iphone Os 1.0.1
Apple Iphone Os 1.0.2
Apple Iphone Os 1.1.0
Apple Iphone Os 1.1.1

Attack profile CVSS 2.0 · 6.1

Attack vector: Adjacent network
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: None
Availability: Complete

Raw vector

AV:A/AC:L/Au:N/C:N/I:N/A:C

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record