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Servers and applications

CVE-2011-3188

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.

Severity
Critical 9.1
Published
24 May 2012
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
5% in the next 30 daysHigher than 92% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed · No user action needed
Attacker can
Change data · Take it down
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Sources
NVD

Affected software

SoftwareAffected versions
F5 BIG-IPServers and applications · cpe:a:f5:big-ip_access_policy_manager
  • From 10.1.0 up to 10.2.4
  • From 11.0.0 up to 11.1.0
F5 BIG-IPServers and applications · cpe:a:f5:big-ip_local_traffic_manager
  • From 10.0.0 up to 10.2.4
  • From 11.0.0 up to 11.1.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2011-3188
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2011-3188