Is CVE-2017-9264 in the CISA KEV catalog?

No. CVE-2017-9264 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-9264?

CVE-2017-9264 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2017-9264?

CVE-2017-9264 has an EPSS score of 2.42% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-9264?

Upgrade openvswitch on debian 11 to 2.8.1+dfsg1-2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2017-9264

CRITICALEPSS 82th pctl

9.8

CVSS v3

NVD

Description

In lib/conntrack.c in the firewall implementation in Open vSwitch (OvS) 2.6.1, there is a buffer over-read while parsing malformed TCP, UDP, and IPv6 packets in the functions `extract_l3_ipv6`, `extract_l4_tcp`, and `extract_l4_udp` that can be triggered remotely.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

openvswitchDebian

Fixed in:2.8.1+dfsg1-2CVE-2017-9264

openvswitchUbuntu

Fixed in:2.5.2-0ubuntu0.16.04.2USN-3450-1

openvswitch-commonUbuntu

Fixed in:2.5.2-0ubuntu0.16.04.2USN-3450-1

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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.42%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Patch1

mail.openvswitch.org

Other references3

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

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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 2026-05-13.