Read the docs
TI-2011-01549 Aliases CVE-2011-1770GHSA-qfgj-vxwq-r49v

Integer underflow in the dccp_parse_options function (net/dccp/options.c) in the Linux…

Priority MEDIUM 40CWE-191Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 2 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-191 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.04364 91st percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 2 fixed, 1 without a fix

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 · 3

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 2.6.33.14VulnerableLinux
cpe:2.3:o:fedoraproject:fedora:14:*:*:*:*:*:*:*14VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:15:*:*:*:*:*:*:*15VulnerableFedoraproject
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 2.6.33.14 Vulnerable ·Linux
  • cpe:2.3:o:fedoraproject:fedora:14:*:*:*:*:*:*:* Versions 14 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:15:*:*:*:*:*:*:* Versions 15 Vulnerable ·Fedoraproject

Remediation

Red Hat 2 advisories

  • RHSA-2011:1253 Released 2011-09-12 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-2.6.33.9-rt31.75.el6rt, kernel-rt-debug-2.6.33.9-rt31.75.el6rt, kernel-rt-debug-devel-2.6.33.9-rt31.75.el6rt +7
  • RHSA-2011:0836 Released 2011-06-01 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-131.2.1.el6, kernel-bootwrapper-2.6.32-131.2.1.el6, kernel-debug-2.6.32-131.2.1.el6 +8

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise MRG 1AffectedNo fix yet
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2011:0836
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2011:1253
Not affected: 2 products
  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-1770
  2. 2026-10-03 Alias added: GHSA-qfgj-vxwq-r49v

References

Patch 4

Advisory 3

Sources

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