HOMEVULNERABILITIESCVE-2021-37137
HIGH

CVE-2021-37137

CWE-400Published: October 19, 2021· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-37137 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
netapp1 product(s)
oncommand insight
netty1 product(s)
netty
Oracle8 product(s)
banking apisbanking digital experiencecommerce guided searchcommunications brm - elastic charging enginecommunications cloud native core binding support functioncommunications diameter signaling routerpeoplesoft enterprise peopletoolswebcenter portal
quarkus1 product(s)
quarkus
Source: NVD CPE · 27 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://www.oracle.com/security-alerts/cpuapr2022.html
PATCHhttps://www.oracle.com/security-alerts/cpujan2022.html
PATCHhttps://www.oracle.com/security-alerts/cpujul2022.html
PATCHhttps://www.oracle.com/security-alerts/cpuapr2022.html
PATCHhttps://www.oracle.com/security-alerts/cpujan2022.html
PATCHhttps://www.oracle.com/security-alerts/cpujul2022.html
ADVISORYhttps://github.com/netty/netty/security/advisories/GHSA-9vjp-v76f-g363
ADVISORYhttps://lists.debian.org/debian-lts-announce/2023/01/msg00008.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20220210-0012/
ADVISORYhttps://www.debian.org/security/2023/dsa-5316
ADVISORYhttps://github.com/netty/netty/security/advisories/GHSA-9vjp-v76f-g363
ADVISORYhttps://lists.debian.org/debian-lts-announce/2023/01/msg00008.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20220210-0012/
ADVISORYhttps://www.debian.org/security/2023/dsa-5316

All References (26)

→
https://github.com/netty/netty/security/advisories/GHSA-9vjp-v76f-g363Third Party Advisory
→
https://lists.apache.org/thread.html/r06a145c9bd41a7344da242cef07977b24abe3349161ede948e30913d%40%3Ccommits.druid.apache.org%3E
→
https://lists.apache.org/thread.html/r5406eaf3b07577d233b9f07cfc8f26e28369e6bab5edfcab41f28abb%40%3Ccommits.druid.apache.org%3E
→
https://lists.apache.org/thread.html/r5e05eba32476c580412f9fbdfc9b8782d5b40558018ac4ac07192a04%40%3Ccommits.druid.apache.org%3E
→
https://lists.apache.org/thread.html/r75490c61c2cb7b6ae2c81238fd52ae13636c60435abcd732d41531a0%40%3Ccommits.druid.apache.org%3E
→
https://lists.apache.org/thread.html/rd262f59b1586a108e320e5c966feeafbb1b8cdc96965debc7cc10b16%40%3Ccommits.druid.apache.org%3E
→
https://lists.apache.org/thread.html/rfb2bf8597e53364ccab212fbcbb2a4e9f0a9e1429b1dc08023c6868e%40%3Cdev.tinkerpop.apache.org%3E
→
https://lists.debian.org/debian-lts-announce/2023/01/msg00008.htmlMailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20220210-0012/Third Party Advisory
→
https://www.debian.org/security/2023/dsa-5316Third Party Advisory
→
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujan2022.htmlPatch · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujul2022.htmlPatch · Third Party Advisory
→
https://github.com/netty/netty/security/advisories/GHSA-9vjp-v76f-g363Third Party Advisory
→
https://lists.apache.org/thread.html/r06a145c9bd41a7344da242cef07977b24abe3349161ede948e30913d%40%3Ccommits.druid.apache.org%3E

Quick Facts

CVE IDCVE-2021-37137
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-400
CISA KEVNo
Affected5 vendor(s)
PublishedOct 19, 2021

Related CVEs (CWE-400)

CVE-2023-30769
9.8
CVE-2024-36543
9.8
CVE-2017-9119
9.8
CVE-2018-11936
9.8
CVE-2025-61303
9.8
CVE-2022-48716
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-37137 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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