CVE-2011-1770

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 4%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
90.2%
KEV
Not listed

Published

June 24, 2011

Last Modified

April 29, 2026

Advisory Details (7)

Auto-updated May 6, 2026
Patch available. Sources: redhat.
redhat Patch Available

703011 – (CVE-2011-1770) CVE-2011-1770 kernel: dccp: handle invalid feature options length

Affected: Red Hat Enterprise Linux 4 and 5: Red Hat Enterprise Linux 4 does not provide support for the Datagram Congestion Control Prot

https://bugzilla.redhat.com/show_bug.cgi?id=703011
generic
http://www.securityfocus.com/bid/47769
generic
http://www.kernel.org/pub/linux/kernel/v2.6/longterm/v2.6.33/ChangeLog-2.6.33.14
generic

linux kernel 2.6.33.13 dccp handle invalid feature options length - CXSecurity.com

http://securityreason.com/securityalert/8286
generic

About Secunia Research | Flexera

http://secunia.com/advisories/44932
generic

'Re: [PATCH] dccp: handle invalid feature options length' - MARC

http://marc.info/?l=linux-kernel&m=130469305815140&w=2
generic

'[PATCH] dccp: handle invalid feature options length' - MARC

http://marc.info/?l=linux-kernel&m=130468845209036&w=2

Vendor Advisories for CVE-2011-1770(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-2.6.35-903-omap4 (2.6.35-903.24) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.32-33-sparc64-smp (2.6.32-33.70) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.32-217-dove (2.6.32-217.34) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.31-610-imx51 (2.6.31-610.28) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.35-30-powerpc (2.6.35-30.59) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.38-10-generic (2.6.38-10.46) @ natty2026-05-29ubuntu
ubuntulinux-image-2.6.38-1209-omap4 (2.6.38-1209.15) @ natty2026-05-29ubuntu
ubuntulinux-image-2.6.32-317-ec2 (2.6.32-317.36) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.32-417-dove (2.6.32-417.34) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.35-30-virtual (2.6.35-30.59~lucid1) @ lucid2026-05-29ubuntu
redhatkernel-rt-0:2.6.33.9-rt31.75.el6rt2011-09-12redhat
redhatkernel-0:2.6.32-131.2.1.el62011-06-01redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(10)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 37× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:03 UTCEPSS rescore
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  1. 2026-06-30 23:19 UTCEPSS rescore
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  51. 2026-05-29 07:40 UTCEG score recompute
  52. 2026-05-29 07:40 UTCVendor advisory
  53. 2026-05-29 07:40 UTCGHSA enrichment
  54. 2026-05-28 13:42 UTCEPSS rescore
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2011-1770?
CVE-2011-1770 is a high vulnerability published on June 24, 2011. Integer underflow in the dccpparseoptions 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.
When was CVE-2011-1770 disclosed?
CVE-2011-1770 was first published in the National Vulnerability Database on June 24, 2011, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-1770 actively exploited?
CVE-2011-1770 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2011-1770?
CVE-2011-1770 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2011-1770?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-1770, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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