Is CVE-2011-3188 being actively exploited?

CVE-2011-3188 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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

CVE-2011-3188 has a CVSS 3.1 base score of 9.1 (CRITICAL).

CVE-2011-3188

CRITICAL · CVSS 9.1EPSS 5.0%EU EUVD

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.

Key facts

CVSS score: 9.1 (v3.1)
Severity: CRITICAL
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS score: 5.0% (92th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-3153)
Published: May 24, 2012
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-3153 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

f5 / arx
f5 / big-ip access policy manager
f5 / big-ip analytics
f5 / big-ip application security manager
f5 / big-ip edge gateway
f5 / big-ip global traffic manager
f5 / big-ip link controller
f5 / big-ip local traffic manager
f5 / big-ip protocol security module
f5 / big-ip wan optimization manager
f5 / big-ip webaccelerator
f5 / enterprise manager
f5 / enterprise manager
f5 / firepass
f5 / firepass
linux / linux kernel
redhat / enterprise linux

Certified products that may be affected

8 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux Kernel Crypto API Cryptographic Module v4.0 with CPACF - Red Hat®, Inc. - FIPS 140 2798 - historical
Red Hat Enterprise Linux Kernel Crypto API Cryptographic Module v4.0 - Red Hat®, Inc. - FIPS 140 2742 - historical
Red Hat Enterprise Linux Libreswan Cryptographic Module v4.0 - Red Hat®, Inc. - FIPS 140 2721 - historical
Red Hat Enterprise Linux NSS Cryptographic Module v4.0 - Red Hat®, Inc. - FIPS 140 2711 - historical
Red Hat Enterprise Linux libgcrypt Cryptographic Module v4.0 [1] and Red Hat Enterprise Linux libgcrypt Cryptographic Module v5.0 [2] - Red Hat®, Inc. - FIPS 140 2657 - historical

See all 8 in the Security Certifications Explorer.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6e5714eaf77d79ae1c8b47e3e040ff5411b717ec
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bc0b96b54a21246e377122d54569eef71cec535f
http://marc.info/?l=bugtraq&m=139447903326211&w=2(Mailing List, Third Party Advisory)
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1(Mailing List, Patch, Vendor Advisory)
http://www.openwall.com/lists/oss-security/2011/08/23/2(Mailing List, Patch, Third Party Advisory)
https://bugzilla.redhat.com/show_bug.cgi?id=732658(Issue Tracking, Patch, Third Party Advisory)
https://github.com/torvalds/linux/commit/6e5714eaf77d79ae1c8b47e3e040ff5411b717ec(Patch, Third Party Advisory)
https://github.com/torvalds/linux/commit/bc0b96b54a21246e377122d54569eef71cec535f(Patch, Third Party Advisory)
https://support.f5.com/csp/article/K15301?utm_source=f5support&amp%3Butm_medium=RSS

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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