What is CVE-2011-1093?

CVE-2011-1093 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476). CVE-2011-1093 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2011-1093?

CVE-2011-1093 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is AV:N/AC:L/Au:N/C:N/I:N/A:C.

Is there a patch available for CVE-2011-1093?

No patch is currently available for CVE-2011-1093. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2011-1093 actively exploited?

CVE-2011-1093 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2011-1093

High

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.

Package Linux Kernel

Published 2011-07-18

Last modified 2026-04-29

CVSS version 2.0

Patch available

Awaiting data

CVSS 2.0 score

7.8

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

User Interaction

Scope

Confidentiality

Low

Integrity

None

Availability

Vector string

AV:N/AC:L/Au:N/C:N/I:N/A:C

Weakness type

CWE-476

CVE-2011-1093 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2011-1093 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Downloads
http://downloads.avaya.com/css/P8/documents/100145416

Third Party Advisory
Red Hat
http://rhn.redhat.com/errata/RHSA-2011-0833.html

Third Party Advisory
Kernel.org
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38

Broken Link
Securityfocus
http://www.securityfocus.com/bid/46793

Third Party Advisory VDB Entry
Kernel patch commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=720dc34bbbe9493c7bd48b2243058b4e447a929d
Patch
Kernel patch commit
http://openwall.com/lists/oss-security/2011/03/08/19
Patch
Kernel patch commit
http://openwall.com/lists/oss-security/2011/03/08/4
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2011-1093

Severity High

CVSS score 7.8 / 10

CVSS version 2.0

Published 2011-07-18

Modified 2026-04-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2011-1093?

CVE-2011-1093 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . CVE-2011-1093 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2011-1093?

CVE-2011-1093 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 2.0). The vector string is AV:N/AC:L/Au:N/C:N/I:N/A:C.
Is there a patch available for CVE-2011-1093?

No patch is currently available for CVE-2011-1093. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2011-1093 actively exploited?

No — CVE-2011-1093 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. View CWE-476 on MITRE CWE →