CVE-2021-38598

CRITICAL
9.1
CVSS Score
Published: August 23, 2021 at 04:17 AM UTC
Updated: June 17, 2026 at 04:02 AM UTC
1 product affected across 1 vendorNeutron

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Severity
CRITICAL9.1
Exploit prediction
EPSS 1%

Description

OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the hardware addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 16.4.117.0.0 ≤ v < 17.1.318.0.0
Affected range stops below 16.4.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.1.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCExploitIssue TrackingThird Party Advisory
https://launchpad.net/bugs/1938670

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-290

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