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CVE-2021-40797

MEDIUM
6.5
CVSS Score
Published: September 8, 2021 at 07:11 PM UTC
Updated: June 17, 2026 at 04:07 AM UTC
1 product affected across 1 vendorNeutron

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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%

Description

An issue was discovered in the routes middleware in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. By making API requests involving nonexistent controllers, an authenticated user may cause the API worker to consume increasing amounts of memory, resulting in API performance degradation or denial of service.

Affected

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

Neutron· Openstack
95%
v < 16.4.117.0.0 ≤ v < 17.2.118.0.0 ≤ v < 18.1.1
Affected range stops below 16.4.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.2.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 18.1.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Mailing Listx_refsource_MLISTPatchThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/09/09/2
x_refsource_MISCExploitIssue TrackingThird Party Advisory
Source: [email protected]
https://launchpad.net/bugs/1942179
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
https://security.openstack.org/ossa/OSSA-2021-006.html

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-772

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