> CVE-2026-56745 [HIGH]

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PUBLISHED
2026-07-21 22:17
MODIFIED
2026-07-21 22:17
CVSS_SCORE V3
8.7
EPSS (Prob. Exploit)
0.63%
Top 49.8%
DATA SOURCES:
NVD đź”— 2026-07-21 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-01 GITHUB đź”— 2026-10-29 OSV đź”— 2026-11-02

> DESCRIPTION

Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, the `SpdyHttpDecoder` handler in Netty's SPDY-to-HTTP codec allocates a pooled `ByteBuf` when processing a client-initiated `SYN_STREAM` frame with `FLAG_FIN=0` and stores the partially constructed `FullHttpRequest` in `messageMap`; when the remote peer sends `RST_STREAM` for that stream or the accumulated content exceeds `maxContentLength`, the decoder removes the entry but does not release the pooled `ByteBuf`, causing native memory exhaustion. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-400

> CWE DETAILED DESCRIPTIONS

CWE-400: Uncontrolled Resource Consumption - The product does not properly control the allocation and maintenance of a limited resource.

> RED HAT SECURITY ADVISORIES

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> GITHUB SECURITY ADVISORY

GHSA-jppx-w49h-x2qq HIGH

Netty: [SpdyHttpDecoder] ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion

AFFECTED PACKAGES:
MAVEN / io.netty:netty-codec-http
>= 4.1.0.Final, <= 4.1.135.Final
Fixed in: 4.1.136.Final
MAVEN / io.netty:netty-codec-http
>= 4.2.0.Final, <= 4.2.15.Final
Fixed in: 4.2.16.Final

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Netty SpdyHttpDecoder: ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion

AFFECTED PACKAGES:
Unknown / Unknown
152 versions affected
ALIASES:
GHSA-jppx-w49h-x2qq

> HISTORIQUE DES MODIFICATIONS

Première apparition
21/07/2026 22:17
Source: NVD
đź“Š ENRICHISSEMENT 01/08/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-400: Uncontrolled Resource Consumption - The product does not properly control the allocation and maintenance of a limited resource.
Total des modifications: 1 Dernière mise à jour: 3 months ago

> REFERENCES

https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b
https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6
https://github.com/netty/netty/releases/tag/netty-4.1.136.Final
https://github.com/netty/netty/releases/tag/netty-4.2.16.Final
https://github.com/netty/netty/security/advisories/GHSA-jppx-w49h-x2qq
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