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CVE-2011-3188

The (1) IPv4 and (2) IPv6 implementations in the Linux kernel before 3.1 use a modified MD4...

9.1 CriticalFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
High

Exploit likelihood

5.03%Up 3.1 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 9.1

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.

Record
CVE-2011-3188
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS 2.0
6.4 MediumAV:N/AC:L/Au:N/C:N/I:P/A:P
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2011-3188
Updated
2026-11-02
EUVDEUVD-2011-3153 No score

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.

Record
EUVD-2011-3153
Updated
2026-11-03
GitHub AdvisoriesGHSA-93rr-wh56-p8fw 9.1

The (1) IPv4 and (2) IPv6 implementations in the Linux kernel before 3.1 use a modified MD4...

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.

Record
GHSA-93rr-wh56-p8fw
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02
OSVSUSE-SU-2015:0652-1 No score

Security update for Kernel

The SUSE Linux Enterprise 11 SP1 Teradata kernel was updated to fix bugs and security issues.

Following security issues were fixed:

CVE-2011-1083: Limit the path length users can build using epoll() to avoid local attackers consuming lots of kernel CPU time.

CVE-2011-4086: Fixed a oops in jbd/jbd2 that could be caused by specific filesystem access patterns.

CVE-2011-4622: KVM: Prevent starting PIT timers in the absence of irqchip support.

CVE-2012-0045: KVM: Extend 'struct x86_emulate_ops' with 'get_cpuid' and fix missing checks in syscall emulation.

CVE-2012-0879: Fix io_context leak after clone with CLONE_IO.

CVE-2012-1090: Fixed a dentry refcount leak in the CIFS file system that could lead to a crash on unmount.

CVE-2012-1097: The regset common infrastructure assumed that regsets would always have .get and .set methods, but necessarily .active methods. Unfortunately people have since written regsets without .set method, so NULL pointer dereference attacks were possible.

Following non-security issues were fixed:

* SCSI inquiry doesn't return data on SLES 11-SP1 Xen VMs (bnc#745929).
* FC transport driver killing off the timers/work queues (bnc#734300).
* The driver ixgbevf doesn't work on newer SLES 11-SP1 kernels
  (bnc#752972).
* Pack sparsemem memmap sections closer together and in higher zones
  (bnc#743870).

Following feature was implemented:

* The megaraid_sas driver update to version 5.40-LSI (bnc#736813).

Security Issues:

* CVE-2011-1083
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1083>
* CVE-2011-4086
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4086>
* CVE-2011-4622
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4622>
* CVE-2012-0045
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0045>
* CVE-2012-0879
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0879>
* CVE-2012-1090
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-1090>
* CVE-2012-1097
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-1097>
Record
SUSE-SU-2015:0652-1
Updated
2026-11-02

Affected products

Show 3 moreShow less

Affected packages

Affected packages
PackageAffectedFixed
linux-2.6
Debian:6.0
before 2.6.32-35squeeze1, plus listed versions
2.6.32-302.6.32-30+m68k.52.6.32-312.6.32-31~bpo50+12.6.32-32
Show 5 moreShow less
2.6.32-332.6.32-342.6.32-34squeeze12.6.32-352.6.32-35~bpo50+1
2.6.32-35squeeze1
linux-2.6
Debian:5.0
before 2.6.26-26lenny4, plus listed versions
2.6.26-132.6.26-13lenny22.6.26-13lenny2~bpo40+12.6.26-142.6.26-15
Show 35 moreShow less
2.6.26-15lenny12.6.26-15lenny22.6.26-15lenny32.6.26-15~bpo40+12.6.26-15~bpo40+22.6.26-162.6.26-172.6.26-17lenny12.6.26-17lenny22.6.26-17lenny2~bpo40+12.6.26-17~bpo40+12.6.26-182.6.26-192.6.26-19lenny12.6.26-19lenny22.6.26-19~bpo40+12.6.26-202.6.26-20~bpo40+12.6.26-212.6.26-21lenny12.6.26-21lenny22.6.26-21lenny32.6.26-21lenny42.6.26-21~bpo40+12.6.26-222.6.26-22lenny12.6.26-232.6.26-242.6.26-24lenny12.6.26-252.6.26-25lenny12.6.26-262.6.26-26lenny12.6.26-26lenny22.6.26-26lenny3
2.6.26-26lenny4
kernel
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-PAE
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-PAE-debuginfo
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-PAE-devel
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-debug
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-debug-debuginfo
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-debug-devel
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-debuginfo
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
Show 75 moreShow less
Affected packages
PackageAffectedFixed
kernel-debuginfo-common
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-devel
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-doc
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-xen
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-xen-debuginfo
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-xen-devel
Red Hat:enterprise_linux:5::client
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-PAE
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-PAE-debuginfo
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-PAE-devel
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-debug
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-debug-debuginfo
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-debug-devel
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-debuginfo
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-debuginfo-common
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-devel
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-doc
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-kdump
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-kdump-debuginfo
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-kdump-devel
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-xen
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-xen-debuginfo
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel-xen-devel
Red Hat:enterprise_linux:5::server
before 0:2.6.18-274.7.1.el5
0:2.6.18-274.7.1.el5
kernel
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-PAE
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-PAE-debuginfo
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-PAE-devel
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-debug
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-debug-debuginfo
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-debug-devel
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-debuginfo
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-debuginfo-common
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-devel
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-doc
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-headers
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-kdump
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-kdump-debuginfo
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-kdump-devel
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-xen
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-xen-debuginfo
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel-xen-devel
Red Hat:rhel_eus:5.6
before 0:2.6.18-238.28.1.el5
0:2.6.18-238.28.1.el5
kernel
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-bootwrapper
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-debug
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-debug-debuginfo
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-debug-devel
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-debuginfo
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-debuginfo-common-i686
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-debuginfo-common-ppc64
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-debuginfo-common-s390x
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-debuginfo-common-x86_64
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-devel
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-doc
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-firmware
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-headers
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-kdump
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-kdump-debuginfo
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-kdump-devel
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
perf
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
perf-debuginfo
Red Hat:enterprise_linux:6::server
before 0:2.6.32-131.21.1.el6
0:2.6.32-131.21.1.el6
kernel-rt
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-debug
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-debug-debuginfo
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-debug-devel
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-debuginfo
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-debuginfo-common-x86_64
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-devel
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-doc
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-firmware
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-trace
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-trace-debuginfo
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-trace-devel
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-vanilla
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-vanilla-debuginfo
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt
kernel-rt-vanilla-devel
Red Hat:enterprise_mrg:2:server:el6
before 0:2.6.33.9-rt31.79.el6rt
0:2.6.33.9-rt31.79.el6rt

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-3188 is a critical vulnerability (CVSS 9.1) in Linux Kernel, published September 8, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.03%, the 92nd percentile. Fixed in linux-2.6 2.6.32-35squeeze1.

References

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Left out here: 1,025 references. The JSON record has them.

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