Is CVE-2011-1770 in the CISA KEV catalog?

No. CVE-2011-1770 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-1770?

CVE-2011-1770 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2011-1770?

CVE-2011-1770 has an EPSS score of 4.36% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2011-1770?

Upgrade linux kernel to 2.6.33.14 or later.

CVE & CISA-KEV Catalog

CVE-2011-1770

HIGHEPSS 90th pctl

7.5

CVSS v3

NVD

Description

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.

CWE-191

How to fix

Remediation Available

linux kernelNVD

Affected:< 2.6.33.14Fixed in:2.6.33.14CVE-2011-1770derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

4.36%probability of exploitation in 30 days

90thpercentile

High risk: more likely to be exploited than 90% of all known CVEs.

References

Patch4

Vendor Advisory2

Third-Party Advisory4

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.