CVE-2023-31431

Switch crash via diagstatus buffer overflow

Published Aug 1, 2023 · Updated Feb 13, 2025

Buffer overflow in the diagstatus command in Brocade Fabric OS before 9.1.1c and 9.2.0 allows local users to crash the switch. Brocade has not published the affected function, input field, or unchecked copy operation inside diagstatus. An authenticated account with command-line access can trigger the flaw without user interaction, interrupting switch availability.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the diagstatus command in Brocade Fabric OS before 9.1.1c and 9.2.0 allows local users to crash the switch. Brocade has not published the affected function, input field, or unchecked copy operation inside diagstatus. An authenticated account with command-line access can trigger the flaw without user interaction, interrupting switch availability.

The record

CVE
CVE-2023-31431
Published
Aug 1, 2023
Updated
Feb 13, 2025
Vendor
Brocade Communications Systems
Product
Fabric OS
Classifications
CWE-120, CAPEC-25, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before Brocade Fabric OS v9.1.1c, v9.2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Brocade Communications Systems · Fabric OSversion=before Brocade Fabric OS v9.1.1c, v9.2.0

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Brocade Communications Systems, LLCCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CAPEC-25Forced Deadlock
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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