What is CVE-2017-9264?

CVE-2017-9264 is a critical-severity vulnerability in Openvswitch, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2017-05-29.

How severe is CVE-2017-9264?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Out-of-bounds Read in Openvswitch

CVE-2017-9264

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.

Vulnerability class: Buffer Overflow

Published 2017-05-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.024 (83.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Openvswitch — versions 2.6.1

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

access.redhat.com/errata/RHSA-2017:2727 (vendor-advisory)
access.redhat.com/errata/RHSA-2017:2418 (vendor-advisory)
mail.openvswitch.org/pipermail/ovs-dev/2017-March/329323.html (Patch, Mailing List, Vendor Advisory)
access.redhat.com/errata/RHSA-2017:2648 (vendor-advisory)

Frequently asked questions

What is CVE-2017-9264?: CVE-2017-9264 is a critical-severity vulnerability in Openvswitch, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2017-05-29.
How severe is CVE-2017-9264?: Critical severity. CVSS v3 base score is 9.8 out of 10.