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Java CVE-2025-9340

NONE
Out-of-bounds Write (CWE-787)
2025-08-22 91579145-5d7b-4cc5-b925-a0262ff19630
Memory Corruption Buffer Overflow Java

Severity by source

NVD
0.0 LOW
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/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:N/AU:X/R:U/V:X/RE:M/U:Green

CVSS VectorNVD

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/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:N/AU:X/R:U/V:X/RE:M/U:Green
Attack Vector
Physical
Attack Complexity
Low
Privileges Required
Low
User Interaction
A
Scope
N

Lifecycle Timeline

3
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 28, 2026 - 19:08 vuln.today
CVE Published
Aug 22, 2025 - 10:15 nvd
NONE

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 80 maven packages depend on org.bouncycastle:bc-fips (4 direct, 77 indirect)

Ecosystem-wide dependent count for version 2.1.0.

DescriptionCVE.org

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.

AnalysisAI

Out-of-bounds Write vulnerability in Legion of the Bouncy Castle Inc. Rated low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. 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.1.0 through 2.1.0. Version information: through 2.1.0..

Affected ProductsAI

See vendor advisory for affected versions.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).

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CVE-2025-9340 vulnerability details – vuln.today
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