Public Date:
695383: CVE-2011-1573 kernel: sctp: fix to calc the INIT/INIT-ACK chunk length correctly to set

The MITRE CVE dictionary describes this issue as:

net/sctp/sm_make_chunk.c in the Linux kernel before 2.6.34, when addip_enable and auth_enable are used, does not consider the amount of zero padding during calculation of chunk lengths for (1) INIT and (2) INIT ACK chunks, which allows remote attackers to cause a denial of service (OOPS) via crafted packet data.

Find out more about CVE-2011-1573 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 4 as it did not support SCTP authentication and extended parameters. It did not affect the version of Linux kernel as shipped with Red Hat Enterprise MRG as it has backported the upstream commit a8170c35 that addressed this. This has been addressed in Red Hat Enterprise Linux 5 and 6 via and

CVSS v2 metrics

Base Score 5.4
Base Metrics AV:N/AC:H/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity High
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (kernel) RHSA-2011:0498 2011-05-10
Red Hat Enterprise Linux 5 (kernel) RHSA-2011:0927 2011-07-15
Last Modified

CVE description copyright © 2017, The MITRE Corporation