CVE-2024-38286Network attack vector

Service interruption via unbounded TLS handshake queue

Published Nov 7, 2024 · Updated Nov 3, 2025

Resource exhaustion in affected Apache Tomcat releases allows remote attackers to trigger an OutOfMemoryError through crafted TLS handshakes. SecureNioChannel and SecureNio2Channel repeatedly queue pending handshake wrap work without a bound when crafted transitions keep SSLEngine in NEED_WRAP. Exploitation requires an enabled TLS connector and the affected handshake behavior; the resulting heap exhaustion interrupts request processing on any platform.

CVSS severity8.6
High
EPSS probability1.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in affected Apache Tomcat releases allows remote attackers to trigger an OutOfMemoryError through crafted TLS handshakes. SecureNioChannel and SecureNio2Channel repeatedly queue pending handshake wrap work without a bound when crafted transitions keep SSLEngine in NEED_WRAP. Exploitation requires an enabled TLS connector and the affected handshake behavior; the resulting heap exhaustion interrupts request processing on any platform.

The record

CVE
CVE-2024-38286
Published
Nov 7, 2024
Updated
Nov 3, 2025
Vendor
The Apache Software Foundation
Product
Apache Tomcat
Classifications
CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=10.1.0-m1 <=10.1.24
  2. Affected versionversion=10.1.0-M1 <=10.1.24
  3. Affected versionversion=11.0.0-m1 <=11.0.0-m20
  4. Affected versionversion=11.0.0-M1 <=11.0.0-M20
  5. Affected versionversion=7.0.92 <=7.0.109
  6. Affected versionversion=8.5.35 <=8.5.100
  7. Affected versionversion=9.0.13 <=9.0.89

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Tomcatversion=10.1.0-m1 <=10.1.24; version=10.1.0-M1 <=10.1.24; version=11.0.0-m1 <=11.0.0-m20; version=11.0.0-M1 <=11.0.0-M20; version=7.0.92 <=7.0.109; version=8.5.35 <=8.5.100; version=9.0.13 <=9.0.89

Published CVSS scores

7.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.6Apache Software FoundationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

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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