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kernel: net: improve sequence number generation

🗓️ 10 Jan 2012 20:10:00Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com

Linux kernel net fixes sequence numbers; before 3.1 IPv4/IPv6 used MD4-like IDs, enabling DoS or session hijacking.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: Potential DOS due to weak IPv4 and IPv6 sequence numbers in SAN Volume Controller and Storwize Family (CVE-2011-3188)
29 Mar 202301:48
–ibm
IBM Security Bulletins		Security Bulletin: IBM System x and Flex Systems Potential Denial of Service Due to Weak IPv4 and IPv6 Sequence Numbers
16 May 202216:03
–ibm
IBM Security Bulletins		Security Bulletin: Potential DOS due to weak IPv4 and IPv6 sequence numbers in IBM Storwize V7000 Unified system (CVE-2011-3188)
18 Jun 201800:07
–ibm
IBM Security Bulletins		Security Bulletin: Flex System Manager (FSM) Denial of Service (CVE-2011-3188)
30 Jan 201908:20
–ibm
IBM Security Bulletins		Security Bulletin: Potential DOS due to weak IPv4 and IPv6 sequence numbers in SAN Volume Controller and Storwize Family (CVE-2011-3188)
20 Aug 202200:54
–ibm
Amazon		Medium: kernel
31 Oct 201100:00
–amazon
Amazon		Medium: kernel
2 Dec 201100:00
–amazon
Tenable Nessus		Amazon Linux AMI : kernel (ALAS-2011-16)
4 Sep 201300:00
–nessus
Tenable Nessus		Amazon Linux AMI : kernel (ALAS-2011-26)
4 Sep 201300:00
–nessus
Tenable Nessus		CentOS 5 : kernel (CESA-2011:1386)
21 Oct 201100:00
–nessus
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux6x86_64kernel-rt0:2.6.33.9-rt31.79.el6rtkernel-rt-0:2.6.33.9-rt31.79.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-debug0:2.6.33.9-rt31.79.el6rtkernel-rt-debug-0:2.6.33.9-rt31.79.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-debug-debuginfo0:2.6.33.9-rt31.79.el6rtkernel-rt-debug-debuginfo-0:2.6.33.9-rt31.79.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-debug-devel0:2.6.33.9-rt31.79.el6rtkernel-rt-debug-devel-0:2.6.33.9-rt31.79.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-debuginfo0:2.6.33.9-rt31.79.el6rtkernel-rt-debuginfo-0:2.6.33.9-rt31.79.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-debuginfo-common-x86_640:2.6.33.9-rt31.79.el6rtkernel-rt-debuginfo-common-x86_64-0:2.6.33.9-rt31.79.el6rt.x86_64.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-devel0:2.6.33.9-rt31.79.el6rtkernel-rt-devel-0:2.6.33.9-rt31.79.el6rt.x86_64.rpm
Red Hat Enterprise Linux6anykernel-rt-doc0:2.6.33.9-rt31.79.el6rtkernel-rt-doc-0:2.6.33.9-rt31.79.el6rt.noarch.rpm
Red Hat Enterprise Linux6anykernel-rt-firmware0:2.6.33.9-rt31.79.el6rtkernel-rt-firmware-0:2.6.33.9-rt31.79.el6rt.noarch.rpm
Red Hat Enterprise Linux6x86_64kernel-rt-trace0:2.6.33.9-rt31.79.el6rtkernel-rt-trace-0:2.6.33.9-rt31.79.el6rt.x86_64.rpm
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21 Nov 2025 17:39Current
7.4High risk
Vulners AI Score7.4
CVSS 26.4
CVSS 3.19.1
EPSS0.04324
linux kernelsequence numbersmd fourfragment identificationdenial of servicesession hijackingremote attackerinternet protocol fourinternet protocol sixnetworking
0