Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-37137

CVE-2021-37137HIGH

The Snappy frame decoder function doesn't restrict the chunk length which may lead to excessive memory usage.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0657   93.7     —

AFFECTED
  Product  Versions       Fixed
  Netty    unspecified –  —

TIMELINE
  Jul 20  Reserved by JFROG
  Oct 19  Published (CNA: JFROG)
  Oct 8   ENRICHED — CVE-2021-37137 (The Netty project Netty). Received CVSS 7.5 and CPE data from NVD.

CWE-400 · CNA: JFROG · CVSS v3.1 · 13 references · NVD status: Modified

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 20, 2021	Reserved	Reserved by JFROG
October 19, 2021	Published	Published (CNA: JFROG)
October 8, 2026	ENRICHED	ENRICHED — CVE-2021-37137 (The Netty project Netty). Received CVSS 7.5 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
The Netty project	Netty	—	unspecified	—

Weaknesses

CWE-400

References (13)

https://github.com/netty/netty/security/advisories/GHSA-9vjp-v76f-g363 [Third 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.html [Mailing List, Third Party Advisory]
https://security.netapp.com/advisory/ntap-20220210-0012/ [Third Party Advisory]
https://www.debian.org/security/2023/dsa-5316 [Third Party Advisory]
https://www.oracle.com/security-alerts/cpuapr2022.html [Patch, Third Party Advisory]
https://www.oracle.com/security-alerts/cpujan2022.html [Patch, Third Party Advisory]
https://www.oracle.com/security-alerts/cpujul2022.html [Patch, Third Party Advisory]

Authoritative record: CVE-2021-37137 at cve.org

Vendors: the netty project

Weaknesses: CWE-400

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-37137 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.