CVE-2022-34038Network attack vector

Process crash via zero page-size division

Published Aug 22, 2023 · Updated Oct 3, 2024

The CVE record states that denial of service in etcd 3.5.4 allows remote attackers to crash the process through PageWriter.Write. NewPageWriter accepts a zero pageBytes value, so PageWriter.Write divides by zero when processing a buffer longer than its default size. The etcd maintainers state that all callers pass positive constants and that no remote path to the condition was reproduced, so they dispute the security impact.

CVSS severity7.5
High
EPSS probability1.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

The CVE record states that denial of service in etcd 3.5.4 allows remote attackers to crash the process through PageWriter.Write. NewPageWriter accepts a zero pageBytes value, so PageWriter.Write divides by zero when processing a buffer longer than its default size. The etcd maintainers state that all callers pass positive constants and that no remote path to the condition was reproduced, so they dispute the security impact.

The record

CVE
CVE-2022-34038
Published
Aug 22, 2023
Updated
Oct 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

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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