CVE-2025-9340 | BDVDB-2026-290759 Detail

Legion of the Bouncy CastleBouncy Castle for Java

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.

Impact#

Per CVSS v4.0: confidentiality impact none, integrity impact none, availability impact none. Attack vector: physical.

Weaknesses#

CWE-787 Out-of-bounds Write

References#

https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902025%E2%80%909340

Exploit#

No public exploit known

History#

Version 12025-08-22Record published in the CVE List.

Published

Published: 2025-08-22
Last modified: 2025-08-22

Vendor information

Vendor: Legion of the Bouncy Castle
Product: Bouncy Castle for Java

All Legion of the Bouncy Castle vulnerabilities

Score

0.0 None

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 7.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= BC-FJA 2.1.0 and <= 2.1.0
Fixed
Not stated

Scoring System

CVSS v4.0

0.0 None

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

Metric breakdown
Attack Vector	Physical
Attack Complexity	Low
Attack Requirements	Present
Privileges Required	Low
User Interaction	Active
Vulnerable System Confidentiality	None
Vulnerable System Integrity	None
Vulnerable System Availability	None
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).