No exploitation reportedFix available

CVE-2011-3188

No exploitation reported by the sources we read.

Published2012-05-24

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The (1) IPv4 and (2) IPv6 implementations in the Linux kernel before 3.1 use a modified MD4 algorithm to generate sequence numbers and Fragment Identification values, which makes it easier for remote attackers to cause a denial of service (disrupted networking) or hijack network sessions by predicting these values and sending crafted packets.

Timeline

dates in UTC

2012-05-2423:55CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2011-3188?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2011-3188?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

F5 big-ip access policy manager

Branch	Affected	Fixed in	Source
10.x	≥ 10.1.0, ≤ 10.2.4	no fix published	NVD
11.x	≥ 11.0.0, ≤ 11.1.0	no fix published	NVD

F5 big-ip application security manager

Branch	Affected	Fixed in	Source
10.x	≥ 10.0.0, ≤ 10.2.4	no fix published	NVD
11.x	≥ 11.0.0, ≤ 11.1.0	no fix published	NVD

F5 big-ip edge gateway

Branch	Affected	Fixed in	Source
10.x	≥ 10.1.0, ≤ 10.2.4	no fix published	NVD
11.x	≥ 11.0.0, ≤ 11.1.0	no fix published	NVD

12 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

www.kernel.orgPatch · Vendor Advisory
www.openwall.comPatch
bugzilla.redhat.comPatch
github.comPatch
github.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.1read 2026-10-23
NVDCVSS 2.06.4read 2026-10-23
FIRST EPSSEPSS score5.0 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published: 2012-05-24
Last Modified: 2026-06-16
NVD status: Modified

Frequently asked questions

What is CVE-2011-3188?

Is CVE-2011-3188 actively exploited?

Active exploitation of CVE-2011-3188 has not been confirmed. Its EPSS score was 5.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2011-3188?

CVE-2011-3188 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

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