CVE-2022-26477Network attack vector

CPU exhaustion via controllable deserialization loop bound

Published Jun 27, 2022 · Updated Aug 3, 2024

Uncontrolled resource consumption in Apache SystemDS before 2.2.2 allows remote attackers to exhaust CPU through crafted serialized data. The readExternal method uses a byte-stream value as a loop termination bound, so a manipulated decoder count drives excessive iteration. Exploitation requires consistent alteration of two stream entries, while CRC protection limits many Spark and sequence-file paths; successful input consumes CPU and interrupts processing.

CVSS severity7.5
High
EPSS probability2.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Apache SystemDS before 2.2.2 allows remote attackers to exhaust CPU through crafted serialized data. The readExternal method uses a byte-stream value as a loop termination bound, so a manipulated decoder count drives excessive iteration. Exploitation requires consistent alteration of two stream entries, while CRC protection limits many Spark and sequence-file paths; successful input consumes CPU and interrupts processing.

The record

CVE
CVE-2022-26477
Published
Jun 27, 2022
Updated
Aug 3, 2024
Vendor
The Apache Software Foundation
Product
Apache SystemDS
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 27, 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=unspecified <2.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache SystemDSversion=unspecified <2.2.2

Published CVSS scores

7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.0NISTAV:N/AC:L/Au:N/C:N/I:N/A:P

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-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation Flaws

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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