CVE-2011-1770

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-06-24 · updated 2026-06-16
Weakness: CWE-191

Description

Integer underflow in the dccp_parse_options function (net/dccp/options.c) in the Linux kernel before 2.6.33.14 allows remote attackers to cause a denial of service via a Datagram Congestion Control Protocol (DCCP) packet with an invalid feature options length, which triggers a buffer over-read.

Affected products

Fedoraproject Fedora: 14, 15
Linux kernel: before 2.6.33.14 — fixed in 2.6.33.14

How to fix

Upgrade to a fixed version: Linux kernel 2.6.33.14. Check the vendor advisory for mitigations.

References

http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061236.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061366.html
http://marc.info/?l=linux-kernel&m=130468845209036&w=2
http://marc.info/?l=linux-kernel&m=130469305815140&w=2
http://secunia.com/advisories/44932
http://securityreason.com/securityalert/8286
http://www.kernel.org/pub/linux/kernel/v2.6/longterm/v2.6.33/ChangeLog-2.6.33.14
http://www.securityfocus.com/bid/47769
http://www.securitytracker.com/id?1025592
https://bugzilla.redhat.com/show_bug.cgi?id=703011
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061236.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061366.html

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