> CVE-2026-59646 [HIGH]

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PUBLISHED
2026-08-03 01:16
MODIFIED
2026-08-03 01:16
CVSS_SCORE V3
8.7
EPSS (Prob. Exploit)
0.46%
Top 59.7%
DATA SOURCES:
NVD đź”— 2026-08-03 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-01 OSV đź”— 2026-11-02

> DESCRIPTION

In Bouncy Castle for Java before 1.85, DTLS handshake reassembler allocates buffer from unchecked 24-bit length. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bctls-fips 1.0.24 (1.0.X series), 2.0.24 (2.0.X series) and 2.1.24 (2.1.X series).

> 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:Amber

> 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:Amber
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-789

> CWE DETAILED DESCRIPTIONS

CWE-789: Memory Allocation with Excessive Size Value - The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Satellite 6.17 security update
A security update for Red Hat Satellite 6.17 is now available. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) ba...
Red Hat Security Advisory: Satellite 6.16 EUS security update
A security update for Red Hat Satellite is now available. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base sc...
Red Hat Security Advisory: Satellite 6.18 security update
A security update for Red Hat Satellite 6.18 is now available. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) ba...
Red Hat Security Advisory: Satellite 6.19 security update
A security update for Red Hat Satellite is now available. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base sc...

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

DTLS handshake reassembler allocates buffer from unchecked 24-bit length

AFFECTED PACKAGES:
Unknown / Unknown
20 versions affected

> HISTORIQUE DES MODIFICATIONS

Première apparition
03/08/2026 01:16
Source: NVD
đź“Š ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-789: Memory Allocation with Excessive Size Value - The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing ar...
Total des modifications: 1 Dernière mise à jour: 2 months ago

> REFERENCES

https://github.com/bcgit/bc-java/commit/2d98721e71bbd822ffa0f84e088eea645cf679fa
https://github.com/bcgit/bc-java/commit/2ea38942c7917f6d7ab4de93d8a5336d021df0d9
https://github.com/bcgit/bc-java/wiki/CVE-2026-59646
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