CVE-2025-9340— native encrypt/decrypt operations in JCE may corrupt data if same byte array used for input and output.
Quick assessment
Affected
Legion of the Bouncy Castle Inc. Bouncy Castle for Java
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Bouncy Castle是Bouncy Castle组织的密码学中使用的API集合。它包括适用于Java和C#编程语言的API 。 Bouncy Castle for Java BC-FJA 2.1.0版本存在安全漏洞，该漏洞源于越界写入，可能导致执行任意代码。
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2025-9340
Vulnerability Information
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Vulnerability Title
native encrypt/decrypt operations in JCE may corrupt data if same byte array used for input and output.
Source: CVE Program / CVE List V5
Vulnerability Description
Out-of-bounds Write vulnerability in Legion of the Bouncy Castle Inc. Bouncy Castle for Java bc-fips on All (API modules). This vulnerability is associated with program files org/bouncycastle/jcajce/provider/BaseCipher.
This issue affects Bouncy Castle for Java: from BC-FJA 2.1.0 through 2.1.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:P/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/S:N/R:U/RE:M/U:Green
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Bouncy Castle 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bouncy Castle是Bouncy Castle组织的密码学中使用的API集合。它包括适用于Java和C#编程语言的API 。 Bouncy Castle for Java BC-FJA 2.1.0版本存在安全漏洞，该漏洞源于越界写入，可能导致执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Legion of the Bouncy Castle Inc. | Bouncy Castle for Java | BC-FJA 2.1.0 ~ 2.1.0 | - |
|
II. Public POCs for CVE-2025-9340
| # | POC Description | Source Link | Shenlong Link |
|---|
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V. Comments for CVE-2025-9340
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