CVE-2022-4132Network attack vector

Service interruption via incomplete TLS connection cleanup

Published Oct 4, 2023 · Updated Sep 19, 2024

Memory exhaustion in JSS packages for Fedora, EPEL, and Red Hat Enterprise Linux allows remote attackers to interrupt Tomcat services. When the server terminates TLS with close_notify, Tomcat calls closeOutbound() but not closeInbound(), preventing JSSEngineReferenceImpl from releasing native resources. The login endpoint must use the non-standard JSS TLS configuration; repeated unauthenticated requests with Connection: close accumulate resources until service exhaustion.

CVSS severity5.9
Medium
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory exhaustion in JSS packages for Fedora, EPEL, and Red Hat Enterprise Linux allows remote attackers to interrupt Tomcat services. When the server terminates TLS with close_notify, Tomcat calls closeOutbound() but not closeInbound(), preventing JSSEngineReferenceImpl from releasing native resources. The login endpoint must use the non-standard JSS TLS configuration; repeated unauthenticated requests with Connection: close accumulate resources until service exhaustion.

The record

CVE
CVE-2022-4132
Published
Oct 4, 2023
Updated
Sep 19, 2024
Vendor
Red Hat
Product
Red Hat Enterprise Linux 8
Classifications
T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 2024Record 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?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
Fedora Project · Fedora LinuxAffected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
Fedora Project · Extra Packages for Enterprise LinuxAffected versions are unavailable in this record.

Published CVSS scores

5.9Red HatCVSS:3.1/AV:N/AC:H/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.

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

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

T1499.003Application Exhaustion Flood

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo