CVE-2011-1093
The dccp_rcv_state_process function in net/dccp/input.c in the Datagram Congestion Control Protocol (DCCP) implementation in the Linux kernel before 2.6.38 does not properly handle packets for a CLOSED endpoint, which allows remote attackers to cause a denial of service (NULL pointer dereference and OOPS) by sending a DCCP-Close packet followed by a DCCP-Reset packet.
Key facts
- CVSS score
- 7.8 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:C- Weakness (CWE)
- CWE-476
- EPSS score
- 3.5% (89th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-1107)
- Published
- July 18, 2011
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-1107 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- linux / linux kernel
- redhat / enterprise linux aus
- redhat / enterprise linux desktop
- redhat / enterprise linux eus
- redhat / enterprise linux server
- redhat / enterprise linux workstation
Certified products that may be affected
2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Red Hat Enterprise Linux Version 5.6 Virtualization with KVM - Red Hat, Inc. - Common Criteria BSI-DSZ-CC-0724-2012 - archived
- Red Hat Enterprise Linux 5 OpenSSH-Server Cryptographic Module - Red Hat®, Inc. - FIPS 140 1384 - historical
References
- http://downloads.avaya.com/css/P8/documents/100145416(Third Party Advisory)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=720dc34bbbe9493c7bd48b2243058b4e447a929d
- http://openwall.com/lists/oss-security/2011/03/08/19(Mailing List, Patch, Third Party Advisory)
- http://openwall.com/lists/oss-security/2011/03/08/4(Mailing List, Patch, Third Party Advisory)
- http://rhn.redhat.com/errata/RHSA-2011-0833.html(Third Party Advisory)
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38(Broken Link)
- http://www.securityfocus.com/bid/46793(Third Party Advisory, VDB Entry)
- https://bugzilla.redhat.com/show_bug.cgi?id=682954(Issue Tracking, Patch, Third Party Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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