7.5

CVE-2021-37137: debian debian_linux Uncontrolled Resource Consumption

Modified
AliasesUBUNTU-CVE-2021-37137DEBIAN-CVE-2021-37137CGA-2fxc-9m2r-qmjg
Published 19-10-2021Last modified 08-10-2026

Vulnerability summary

CVE-2021-37137 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in debian debian_linux. EPSS estimates a 6.57% chance of exploitation in the next 30 days, higher than 93.8% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 7% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
6.57%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 13 · Related 8
DLA-3268-1DSA-5316-1OPENSUSE-SU-2024:14442-1RHSA-2022:4918RHSA-2022:4919RHSA-2022:8506

Timeline

  1. 19-10-2021
    PublishedVulnerability first disclosed.
  2. 08-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

7 scores · 6 sources · 2 versions

EPSS trend

Probability

6.57%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

No change 0.00 pp

From 6.57% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Oracle8 products
Chainguard4 products
  • druidAll versions (No fix recorded) | < 34.0.0-r6
  • hadoop-fips-3.3.6All versions (No fix recorded)
  • hadoop-fips-3.4.2All versions (No fix recorded)
  • hadoop-fips-3.5All versions (No fix recorded)
Debian2 products
Io.netty2 products
  • nettyAll versions (No fix recorded)
  • netty-codec≥ 4.0.0, < 4.1.68.Final
Netapp1 product
Netty1 product
Org.jboss.netty1 product
  • nettyAll versions (No fix recorded)
Quarkus1 product
The netty project1 product
  • netty≥ unspecified, < 4.1.68Final
Ubuntu1 product
  • nettyAll versions (No fix recorded) | < 1:4.0.34-1ubuntu0.1~esm1 | < 1:4.1.7-4ubuntu0.1+esm2 | < 1:4.1.45-1ubuntu0.1~esm1 | < 1:4.1.48-4+deb11u1build0.22.04.1
Wolfi1 product
  • druidAll versions (No fix recorded) | < 34.0.0-r6

11 vendors · 23 products

References

30 links
Show all 30 references