`CVE-2021-37137`

Affected software	8 products, listed below
Severity	7.5 High CVSS 3.1 2 scores
Fixed in	`4.1.68.Final`
Weakness	Uncontrolled resource consumption (CWE-400)
Published	19 Oct 2021
Updated	8 Oct 2026

Description

The Snappy frame decoder function doesn't restrict the chunk length which may lead to excessive memory usage. Beside this it also may buffer reserved skippable chunks until the whole chunk was received which may lead to excessive memory usage as well. This vulnerability can be triggered by supplying malicious input that decompresses to a very big size (via a network stream or a file) or by sending a huge skippable chunk.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 5 years ago.

CISA KEV not listed
VulnCheck KEV not listed
CISA Vulnrichment exploitation: none
Indexed PoC none indexed
EPSS 6.6% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

Protection none
Action not pursued none
Review human Researcher
Record active

Decided by	Manual classification of this CVE in the legacy dataset
Finding	A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

Decided by

Manual classification of this CVE in the legacy dataset

Finding

A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

7.5 HIGH v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

Version Score Band Vector Assigner Type

CVSS 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD Primary published

CVSS 2.0 5.0 none AV:N/AC:L/Au:N/C:N/I:N/A:P NVD Primary

Version	Score	Band	Vector	Assigner	Type
CVSS 3.1	7.5	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`	NVD	Primary	published
CVSS 2.0	5.0	none	`AV:N/AC:L/Au:N/C:N/I:N/A:P`	NVD	Primary

Affected software and releases

Oracle advisories

Advisory	Type	Quarter	Products Oracle names in its risk matrix
Oracle Critical Patch Update October 2024 ↗	CPU	2024-Q4	Oracle Communications Applications / Core (Snappy) (5.5.0-5.5.22, 6.0.0-6.0.3)
Oracle Critical Patch Update April 2023 ↗	CPU	2023-Q2	Oracle Communications Applications / Core (Apache Kafka) (5.5.0-5.5.10, 6.0.0-6.0.2)
Oracle Critical Patch Update July 2022 ↗	CPU	2022-Q3	Oracle Communications Applications / 5G gateway (Google Snappy) (Prior to 12.0.0.4.6, Prior to 12.0.0.5.1)
Oracle Critical Patch Update April 2022 ↗	CPU	2022-Q2	Oracle Fusion Middleware / Security Framework (Netty) (12.2.1.3.0, 12.2.1.4.0)
Oracle Critical Patch Update January 2022 ↗	CPU	2022-Q1	Oracle Commerce / Content Acquisition System (Netty) (11.3.2) Oracle Communications / API Gateway (Netty) (8.0.0.0-8.5.0.2) Oracle Communications / Binding Support Function (Netty) (1.10.0) Oracle Financial Services Applications / Framework (Netty) (18.1-18.3, 19.1, 19.2, 20.1, 21.1) Oracle Financial Services Applications / Framework (Netty) (18.1-18.3, 19.1, 19.2, 20.1, 21.1) Oracle PeopleSoft / Elastic Search (Netty) (8.57, 8.58, 8.59)

Advisory

Type

Quarter

Products Oracle names in its risk matrix

Oracle Critical Patch Update October 2024 ↗

CPU

2024-Q4

Oracle Communications Applications / Core (Snappy) (5.5.0-5.5.22, 6.0.0-6.0.3)

Oracle Critical Patch Update April 2023 ↗

CPU

2023-Q2

Oracle Communications Applications / Core (Apache Kafka) (5.5.0-5.5.10, 6.0.0-6.0.2)

Oracle Critical Patch Update July 2022 ↗

CPU

2022-Q3

Oracle Communications Applications / 5G gateway (Google Snappy) (Prior to 12.0.0.4.6, Prior to 12.0.0.5.1)

Oracle Critical Patch Update April 2022 ↗

CPU

2022-Q2

Oracle Fusion Middleware / Security Framework (Netty) (12.2.1.3.0, 12.2.1.4.0)

Oracle Critical Patch Update January 2022 ↗

CPU

2022-Q1

Oracle Commerce / Content Acquisition System (Netty) (11.3.2)
Oracle Communications / API Gateway (Netty) (8.0.0.0-8.5.0.2)
Oracle Communications / Binding Support Function (Netty) (1.10.0)
Oracle Financial Services Applications / Framework (Netty) (18.1-18.3, 19.1, 19.2, 20.1, 21.1)
Oracle Financial Services Applications / Framework (Netty) (18.1-18.3, 19.1, 19.2, 20.1, 21.1)
Oracle PeopleSoft / Elastic Search (Netty) (8.57, 8.58, 8.59)

Oracle components and versions

Family	Component	Versions, as Oracle lists them	Read as
Oracle Commerce	Content Acquisition System (Netty)	11.3.2	11.3.2
Oracle Communications	API Gateway (Netty)	8.0.0.0-8.5.0.2
Oracle Communications	Binding Support Function (Netty)	1.10.0	1.10.0
Oracle Communications Applications	5G gateway (Google Snappy)	Prior to 12.0.0.4.6, Prior to 12.0.0.5.1
Oracle Communications Applications	Core (Apache Kafka)	5.5.0-5.5.10, 6.0.0-6.0.2
Oracle Communications Applications	Core (Snappy)	5.5.0-5.5.22, 6.0.0-6.0.3
Oracle Financial Services Applications	Framework (Netty)	18.1-18.3, 19.1, 19.2, 20.1, 21.1	19.1 · 19.2 · 20.1 · 21.1
Oracle Fusion Middleware	Security Framework (Netty)	12.2.1.3.0, 12.2.1.4.0	12.2.1.3.0 · 12.2.1.4.0
Oracle PeopleSoft	Elastic Search (Netty)	8.57, 8.58, 8.59	8.57 · 8.58 · 8.59

Family

Component

Versions, as Oracle lists them

Read as

Oracle Commerce

Content Acquisition System (Netty)

11.3.2

Oracle Communications

API Gateway (Netty)

8.0.0.0-8.5.0.2

Oracle Communications

Binding Support Function (Netty)

1.10.0

Oracle Communications Applications

5G gateway (Google Snappy)

Prior to 12.0.0.4.6, Prior to 12.0.0.5.1

Oracle Communications Applications

Core (Apache Kafka)

5.5.0-5.5.10, 6.0.0-6.0.2

Oracle Communications Applications

Core (Snappy)

5.5.0-5.5.22, 6.0.0-6.0.3

Oracle Financial Services Applications

Framework (Netty)

18.1-18.3, 19.1, 19.2, 20.1, 21.1

19.1 · 19.2 · 20.1 · 21.1

Oracle Fusion Middleware

Security Framework (Netty)

12.2.1.3.0, 12.2.1.4.0

12.2.1.3.0 · 12.2.1.4.0

Oracle PeopleSoft

Elastic Search (Netty)

8.57, 8.58, 8.59

8.57 · 8.58 · 8.59

Maven packages

Affected and fixed versions, from OSV.dev

Package Introduced Fixed Last affected

io.netty:netty-codec 4.0.0 4.1.68.Final unbounded

org.jboss.netty:netty 0 none unbounded

io.netty:netty 0 none unbounded

Package	Introduced	Fixed	Last affected
`io.netty:netty-codec`	4.0.0	`4.1.68.Final`	unbounded
`org.jboss.netty:netty`	0	none	unbounded
`io.netty:netty`	0	none	unbounded

Products and versions

15 products, 30 version entries

Source	Vendor	Product	Scheme	Affected versions
nvd	debian	debian linux	generic	10.0 · 11.0
osv	io.netty	netty	generic	any version
osv	io.netty	netty-codec	generic	≥ 4.0.0 and ＜ 4.1.68
nvd	netapp	oncommand insight	generic	any version
nvd	netty	netty	generic	＜ 4.1.68
nvd	oracle	banking apis	generic	≥ 18.1 and ≤ 18.3 · 19.1 · 19.2 · 20.1 · 21.1
nvd	oracle	banking digital experience	generic	18.1 · 18.2 · 18.3 · 19.1 · 19.2 · 20.1 · 21.1
nvd	oracle	commerce guided search	generic	11.3.2
nvd	oracle	communications brm - elastic charging engine	generic	＜ 12.0.0.4.6 · 12.0.0.5.0
nvd	oracle	communications cloud native core binding support function	generic	1.10.0
nvd	oracle	communications diameter signaling router	generic	≥ 8.0.0.0 and ≤ 8.5.0.2
nvd	oracle	peoplesoft enterprise peopletools	generic	8.57 · 8.58 · 8.59
nvd	oracle	webcenter portal	generic	12.2.1.3.0 · 12.2.1.4.0
osv	org.jboss.netty	netty	generic	any version
nvd	quarkus	quarkus	generic	＜ 2.2.4

Source

Vendor

Product

Scheme

Affected versions

nvd

debian

debian linux

generic

10.0 · 11.0

osv

io.netty

netty

generic

any version

osv

io.netty

netty-codec

generic

≥ 4.0.0 and ＜ 4.1.68

nvd

netapp

oncommand insight

generic

any version

nvd

netty

generic

＜ 4.1.68

nvd

oracle

banking apis

generic

≥ 18.1 and ≤ 18.3 · 19.1 · 19.2 · 20.1 · 21.1

nvd

oracle

banking digital experience

generic

18.1 · 18.2 · 18.3 · 19.1 · 19.2 · 20.1 · 21.1

nvd

oracle

commerce guided search

generic

11.3.2

nvd

oracle

communications brm - elastic charging engine

generic

＜ 12.0.0.4.6 · 12.0.0.5.0

nvd

oracle

communications cloud native core binding support function

generic

1.10.0

nvd

oracle

communications diameter signaling router

generic

≥ 8.0.0.0 and ≤ 8.5.0.2

nvd

oracle

peoplesoft enterprise peopletools

generic

8.57 · 8.58 · 8.59

nvd

oracle

webcenter portal

generic

12.2.1.3.0 · 12.2.1.4.0

osv

org.jboss.netty

netty

generic

any version

nvd

quarkus

generic

＜ 2.2.4

Earlier manual review

A reviewer classified this CVE in an older dataset. We kept the labels and products below, but not the reviewer's reasoning.

## Manual Classification Context **Labels:** HTTP, TCP, API GATEWAY (NETTY), BINDING SUPPORT FUNCTION (NETTY), ELASTIC SEARCH (NETTY), CONTENT ACQUISITION SYSTEM (NETTY), MULTIPLE, NO AUTH REMOTE EXPLOIT, FRAMEWORK (NETTY) **Products:** ORACLE BANKING APIS, ORACLE COMMERCE GUIDED SEARCH, ORACLE PEOPLESOFT, ORACLE COMMERCE, ORACLE COMMUNICATIONS CLOUD NATIVE CORE BINDING SUPPORT FUNCTION, PEOPLESOFT ENTERPRISE PEOPLETOOLS, ORACLE FINANCIAL SERVICES APPLICATIONS, ORACLE BANKING DIGITAL EXPERIENCE, ORACLE COMMUNICATIONS DIAMETER SIGNALING ROUTER, ORACLE COMMUNICATIONS

References

URL	Tags
https://github.com/netty/netty/security/advisories/GHSA-9vjp-v76f-g363	WEB
https://github.com/netty/netty/commit/6da4956b31023ae967451e1d94ff51a746a9194f	WEB
https://www.oracle.com/security-alerts/cpujul2022.html	WEB
https://www.oracle.com/security-alerts/cpujan2022.html	WEB
https://www.oracle.com/security-alerts/cpuapr2022.html	WEB
https://www.debian.org/security/2023/dsa-5316	WEB
https://security.netapp.com/advisory/ntap-20220210-0012	WEB
https://lists.debian.org/debian-lts-announce/2023/01/msg00008.html	WEB
https://lists.apache.org/thread.html/rfb2bf8597e53364ccab212fbcbb2a4e9f0a9e1429b1dc08023c6868e@%3Cdev.tinkerpop.apache.org%3E	WEB
https://lists.apache.org/thread.html/rd262f59b1586a108e320e5c966feeafbb1b8cdc96965debc7cc10b16@%3Ccommits.druid.apache.org%3E	WEB

URL

Timeline

Published	2021-10-19	By the CVE Program.
NVD record modified	2026-10-08	NVD's own last-modified date for this record.

Published

2021-10-19

By the CVE Program.

NVD record modified

2026-10-08

NVD's own last-modified date for this record.

How VRT decided (5 of 24 rules ran)

5 of 24 rules ran. The rest didn't run because an earlier rule had already settled the CVE.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? the first rule that matches decides

1 rejected no match CVE Program withdrawal of this identifier

scope: Is it a vulnerability Waratek protects? the first rule that matches decides

2 armr-patch-file no match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no match An ARMR security-rule template on disk for this CVE

4 manual-classification no match A researcher's recorded decision for this specific CVE

5 manual classification decided it matched Outside Waratek scope Found in legacy manual classifications

6 non-java-upstream not reached A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component not reached The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the JInitiator browser plug-in, the native WebLogic proxy plug-in, or a native part of Oracle Application Server or Collaboration Suite (HTTP Server, Web Cache, Internet Directory, mail and calendar servers). Oracle gives these no CPE of their own and names them only in the description.

8 java-client-side not reached Oracle's own risk-matrix note saying the CVE is reached only through untrusted code in the Java sandbox (applets, Web Start) or only through a client installation of Java, so a server running its own trusted code is not exposed

9 osv-maven not reached An OSV.dev record of this CVE affecting a package published to Maven Central. When every such package is one business applications do not use (Minecraft mods and launchers, Fastjson) and no tracked product is named by CPE, it settles the CVE as Outside Waratek scope instead

10 cna-maven-package not reached An affected Maven artifact named by the CNA itself

11 known-cpe-product not reached An NVD CPE naming a product ARMR tracks

12 cna-cpe-product not reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

13 oracle-advisory-family not reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

14 cna-named-product not reached A tracked product named in words by the CVE's own CNA, on a record with no CPE yet. Apache and Eclipse publish these on advisory day, before NVD adds CPE data.

15 non-deployable-product not reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

16 unmatched-product not reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? every rule runs

17 patch-hint not reached A reference pointing at the upstream fix: a commit, a PR, a Red Hat bug

18 open-source-maven not reached The affected package being open source on Maven, so the fix can be read

19 poc-derivable not reached An indexed exploit clearing the evidence bar to reverse-engineer, where there is no source to read

20 no-exploit not reached Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read

21 secure-rule-match not reached A vulnerability class already blocked by an ARMR security rule

22 exploited-no-fix-or-poc not reached Somebody exploiting this CVE (a CISA or VulnCheck KEV listing, or a CISA verdict of active exploitation), with no fix, source code or PoC to build a rule from

23 below-action-threshold not reached Medium or Low severity, no CISA or VulnCheck KEV listing, no PoC clearing the evidence bar, no CISA verdict, no Oracle advisory

24 no-exploit-published not reached Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all

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