Scheduler denial of service via unbounded plugin responses
Published Apr 30, 2025 · Updated May 1, 2025
Uncontrolled resource consumption in affected Volcano releases allows remote attackers to crash or freeze the scheduler via HTTP responses. The Elastic metrics client and extender plugin decode entire response bodies without a size limit, exhausting scheduler memory. Exploitation requires control of either service or its pod or node; the resulting OOM panic or memory saturation stops scheduling for cluster workloads.
Summary
What happened
Uncontrolled resource consumption in affected Volcano releases allows remote attackers to crash or freeze the scheduler via HTTP responses. The Elastic metrics client and extender plugin decode entire response bodies without a size limit, exhausting scheduler memory. Exploitation requires control of either service or its pod or node; the resulting OOM panic or memory saturation stops scheduling for cluster workloads.
The record
- CVE
- CVE-2025-32777
- Published
- Apr 30, 2025
- Updated
- May 1, 2025
- Vendor
- Volcano
- Product
- Volcano
- Classifications
- CWE-770, CWE-400, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 30, 2025CVE publishedPublication date reported by the CVE source.
- May 1, 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.
- Affected versionversion=>= 1.10.0-alpha.0, < 1.10.2
- Affected versionversion=>= 1.11.0, < 1.11.2
- Affected versionversion=>= 1.11.0-network-topology-preview.0, < 1.11.0-network-topology-preview.3
- Affected versionversion=>= 1.12.0-alpha.0, < 1.12.0-alpha.2
- Affected versionversion=< 1.9.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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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