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TI-2011-00946 Aliases CVE-2011-1093GHSA-rf9x-2w4m-rh77

The dccp_rcv_state_process function in net/dccp/input.c in the Datagram Congestion…

Priority MEDIUM 40CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Complete
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

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.

Why it matters now

EPSS 0.03477 89th percentileScored 2026-11-07
Fix Fixed Red Hat: 3 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 2.6.38VulnerableLinux
cpe:2.3:o:redhat:enterprise_linux_aus:5.6:*:*:*:*:*:*:*5.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*5.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_eus:5.6:*:*:*:*:*:*:*5.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*5.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*5.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 2.6.38 Vulnerable ·Linux
  • cpe:2.3:o:redhat:enterprise_linux_aus:5.6:*:*:*:*:*:*:* Versions 5.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_eus:5.6:*:*:*:*:*:*:* Versions 5.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat

Remediation

Red Hat 3 advisories

  • RHSA-2011:0833 Released 2011-05-31 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux (v. 5.6.z server) kernel-2.6.18-238.12.1.el5, kernel-2.6.18-238.12.1.el5.ia64, kernel-PAE-2.6.18-238.12.1.el5 +14
  • RHSA-2011:0498 Released 2011-05-10 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Desktop (v. 6) kernel-2.6.32-71.29.1.el6, kernel-debug-2.6.32-71.29.1.el6, kernel-debug-devel-2.6.32-71.29.1.el6 +4
    • Red Hat Enterprise Linux HPC Node (v. 6) kernel-2.6.32-71.29.1.el6, kernel-debug-2.6.32-71.29.1.el6, kernel-debug-devel-2.6.32-71.29.1.el6 +4
    • Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-71.29.1.el6, kernel-bootwrapper-2.6.32-71.29.1.el6, kernel-debug-2.6.32-71.29.1.el6 +7
    • Red Hat Enterprise Linux Workstation (v. 6) kernel-2.6.32-71.29.1.el6, kernel-debug-2.6.32-71.29.1.el6, kernel-debug-devel-2.6.32-71.29.1.el6 +4
  • RHSA-2011:0500 Released 2011-05-10 · Red Hat rating Important
    kernel-rt security and bug fix update
    • MRG Realtime for RHEL 5 Server kernel-rt-2.6.33.9-rt31.64.el5rt, kernel-rt-debug-2.6.33.9-rt31.64.el5rt, kernel-rt-debug-devel-2.6.33.9-rt31.64.el5rt +7

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
MRG Realtime for RHEL 5 ServerFixed RHSA-2011:0500
Red Hat Enterprise Linux (v. 5.6.z server)Fixed RHSA-2011:0833
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2011:0498
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2011:0498
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2011:0498
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2011:0498
Not affected: 5 products
  • Red Hat Enterprise Linux (v. 5.6.z server)
  • Red Hat Enterprise Linux Desktop (v. 6)
  • Red Hat Enterprise Linux HPC Node (v. 6)
  • Red Hat Enterprise Linux Server (v. 6)
  • Red Hat Enterprise Linux Workstation (v. 6)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-1093
  2. 2026-10-03 Alias added: GHSA-rf9x-2w4m-rh77

References

Patch 3

Advisory 2

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences