CVE-2020-11612: debian debian_linux
Vulnerability summary
CVE-2020-11612 is a high (CVSS 7.5) vulnerability in debian debian_linux. EPSS estimates a 9.19% chance of exploitation in the next 30 days, higher than 95.3% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 9% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 12 · Duplicates 1 · Related 6Timeline
- 07-04-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
The ZlibDecoders in Netty 4.1.x before 4.1.46 allow for unbounded memory allocation while decoding a ZlibEncoded byte stream. An attacker could send a large ZlibEncoded byte stream to the Netty server, forcing the server to allocate all of its free memory to a single decoder.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · MavenEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
9.19%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
No change 0.00 pp
From 9.19% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat27 products
- nodejs-rhea< 0:1.0.21-1.el8
- python-qpid-proton< 0:0.31.0-3.el6_10 | < 0:0.31.0-3.el7
- python-qpid-proton-docs< 0:0.31.0-3.el6_10 | < 0:0.31.0-3.el7 | < 0:0.31.0-3.el8
- python3-qpid-proton< 0:0.31.0-3.el8
- python3-qpid-proton-debuginfo< 0:0.31.0-3.el8
Oracle7 products
- communications_brm_-_elastic_charging_engine12.0.0.3
- communications_cloud_native_core_service_communication_proxy1.5.2
- communications_design_studio7.4.2
- communications_messaging_server8.1
- nosql_database< 20.3
Netapp3 products
Debian2 products
- netty< 1:4.1.48-1
- debian_linuxEOL9.0 | 10.0
Fedoraproject1 product
- fedoraEOL33
Io.netty1 product
- netty-handler≥ 4.1.0, < 4.1.46
Netty1 product
- netty≥ 4.1, < 4.1.46
Ubuntu1 product
- nettyAll versions (No fix recorded) | < 1:4.0.34-1ubuntu0.1~esm1 | < 1:4.1.7-4ubuntu0.1 | < 1:4.1.45-1ubuntu0.1~esm1
8 vendors · 43 products
References
108 linksShow all 100 references
lists.debian.org/debian-lts-announce/2020/09/msg00003.htmlMailing ListX Refsource MLISTWEBThird Party Advisory- github.com/netty/netty/compare/netty-4.1.45.Final...netty-4.1.46.FinalX Refsource MISCREPORTWEBPatchThird Party Advisory
- lists.apache.org/thread.html/…X Refsource MISC
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