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CVE-2011-1093

27
FAUCET Score

CVE-2011-1093 describes a denial-of-service vulnerability in the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation, affecting various Linux distributions including Red Hat. An attacker can trigger a NULL pointer dereference and system crash (OOPS) by sending specific DCCP packets to a CLOSED endpoint. This vulnerability has a high severity CVSS score of 7.8, indicating a network-based attack with low complexity and a complete impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.6.38CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
5.6CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_aus:5.6:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
5.6CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_eus:5.6:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.48%
Probability of exploitation in next 30 days
EPSS Percentile
87.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0348 is in the 78th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: MRG for RHEL-5Fixed in: kernel-rt-0:2.6.33.9-rt31.64.el5rt
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-238.12.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-71.29.1.el6
View patch

Vendor Advisories (1)

redhatCVE-2011-1093Important

kernel: dccp: fix oops on Reset after close

Mar 2, 2011

References

downloads.avaya.com / css/P8/documents/100145416
Third Party Advisory
git.kernel.org
openwall.com / lists/oss-security/2011/03/08/19
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2011/03/08/4
Mailing ListPatchThird Party Advisory
rhn.redhat.com / errata/RHSA-2011-0833.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
kernel.org / pub/linux/kernel/v2.6/ChangeLog-2.6.38
Broken Link
securityfocus.com / bid/46793
Third Party AdvisoryVDB Entry