CVE-2022-32189Public exploitNetwork attack vector

Application crash via unchecked Gob buffer lengths

Published Aug 9, 2022 · Updated Aug 3, 2024

Improper input validation in Go standard library math/big before 1.17.13 and 1.18.0 through 1.18.4 allows remote attackers to crash applications. Float.GobDecode and Rat.GobDecode index undersized byte slices before validating header and length fields, causing a runtime panic. Exploitation requires an application to pass attacker-controlled Gob data to either decoder; the observed consequence is process termination, not data access or modification.

CVSS severity7.5
High
EPSS probability2.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Go standard library math/big before 1.17.13 and 1.18.0 through 1.18.4 allows remote attackers to crash applications. Float.GobDecode and Rat.GobDecode index undersized byte slices before validating header and length fields, causing a runtime panic. Exploitation requires an application to pass attacker-controlled Gob data to either decoder; the observed consequence is process termination, not data access or modification.

The record

CVE
CVE-2022-32189
Published
Aug 9, 2022
Updated
Aug 3, 2024
Vendor
Go standard library
Product
math/big
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=0 <1.17.13
  2. Affected versionversion=1.18.0-0 <1.18.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · math/bigversion=0 <1.17.13; version=1.18.0-0 <1.18.5

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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