CVE-2024-3653VulnerabilityPublished 8 Jul 2024Updated 8 Sep 2026

CVE-2024-3653: Red Hat build of Quarkus 3.8.6.redhat · Memory Leak

Affects Red Hat build of Quarkus 3.8.6.redhatSource CVE Database V5

Not known to be exploited · CVSS 5.3 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 1.8% chance of exploitation in 30 days – higher than 79% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: Low

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 8 Jul 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Red HatRed Hat build of Quarkus 3.8.6.redhat	Affected–	Fixed in–
Red HatRed Hat JBoss Enterprise Application Platform	Affected–	Fixed in–
Red HatRed Hat JBoss Enterprise Application Platform 7.4 for RHEL 8	Affected–	Fixed in–
Red HatRed Hat JBoss Enterprise Application Platform 7.4 for RHEL 9	Affected–	Fixed in–
Red HatRed Hat JBoss Enterprise Application Platform 7.4 on RHEL 7	Affected–	Fixed in–
Red HatRed Hat JBoss Enterprise Application Platform 8	Affected–	Fixed in–
Red HatOpenShift Serverless	Affected–	Fixed in–
Red HatRed Hat build of Apache Camel 4 for Quarkus 3	Affected–	Fixed in–
Red HatRed Hat build of Apache Camel for Spring Boot 4	Affected–	Fixed in–
Red HatRed Hat build of Apache Camel - HawtIO 4	Affected–	Fixed in–
Red HatRed Hat build of Apicurio Registry 2	Affected–	Fixed in–
Red HatRed Hat Build of Keycloak	Affected–	Fixed in–
Red HatRed Hat build of OptaPlanner 8	Affected–	Fixed in–
Red HatRed Hat build of Quarkus	Affected–	Fixed in–
Red HatRed Hat Data Grid 8	Affected–	Fixed in–
Red HatRed Hat Fuse 7	Affected–	Fixed in–
Red HatRed Hat Integration Camel K 1	Affected–	Fixed in–
Red HatRed Hat Integration Camel Quarkus 2	Affected–	Fixed in–
Red HatRed Hat JBoss Data Grid 7	Affected–	Fixed in–
Red HatRed Hat JBoss Enterprise Application Platform Expansion Pack	Affected–	Fixed in–
Red HatRed Hat JBoss Fuse Service Works 6	Affected–	Fixed in–
Red HatRed Hat Process Automation 7	Affected–	Fixed in–
Red HatRed Hat Single Sign-On 7	Affected–	Fixed in–
Red Hatstreams for Apache Kafka	Affected–	Fixed in–
GitHubundertow`pkg:github/undertow`Other threats	Affected <=2.3.14.Final	Fixed in–
Mavenio.undertow/undertow-core`pkg:maven/io.undertow/undertow-core`Other threats	Affected =0	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released official security updates for Red Hat JBoss Enterprise Application Platform versions 7.4 and 8.0 that address this vulnerability. Applying these updates will remediate the issue. Alternatively, disabling the learning-push handler or explicitly configuring the maxAge parameter to a non-default value will prevent exploitation. Users should follow Red Hat's guidance and apply the relevant errata updates as detailed in the vendor advisories. Patch status is confirmed as fixed in these updates.

Description

A vulnerability was found in Undertow. This issue requires enabling the learning-push handler in the server's config, which is disabled by default, leaving the maxAge config in the handler unconfigured. The default is -1, which makes the handler vulnerable. If someone overwrites that config, the server is not subject to the attack. The attacker needs to be able to reach the server with a normal HTTP request.

Impact

The vulnerability allows a remote attacker to cause a denial of service by exhausting server memory due to the learning-push handler not releasing memory properly when maxAge is set to its default of -1. There is no impact on confidentiality or integrity. The attack requires no privileges and no user interaction beyond sending normal HTTP requests to the server with the vulnerable handler enabled and unconfigured. This can degrade or disrupt service availability.

Summary

CVE-2024-3653 is a vulnerability in the Undertow web server component used by Red Hat JBoss Enterprise Application Platform. The flaw occurs when the learning-push handler is enabled without configuring the maxAge parameter, which defaults to -1, resulting in a condition where memory is not released after its effective lifetime. This can be exploited remotely by an attacker sending standard HTTP requests, leading to a denial of service via memory exhaustion. The vulnerability is not present if the maxAge configuration is overwritten from its default. Red Hat has issued security advisories and patches for affected versions of JBoss Enterprise Application Platform 7.4 and 8.0 to remediate this issue.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Aug 2026, 13:15 UTC

Technical details

References

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