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CVE-2025-9340: legion of the bouncy castle inc. bouncy castle for java Out-of-bounds Write

CVSS: 0.0v4.0UnknownDeferred
AliasesGHSA-g6rx-6wfx-gj74
Published 22-08-2025Last modified 22-08-2025
Open JSON

Vulnerability summary

CVE-2025-9340 is a Out-of-bounds Write vulnerability in legion of the bouncy castle inc. bouncy castle for java with no CVSS score yet. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.9% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
0.0/10
010
Unknown · v4.0 (CVE.org)
EPSS score
0.18%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 22-08-2025
    PublishedVulnerability first disclosed.
  2. 22-08-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

+0.01 pp

From 0.17% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.18%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Legion of the bouncy castle inc.1 product
Org.bouncycastle1 product
  • bc-fips≥ 2.1.0, < 2.1.1

2 vendors · 2 products

References

3 links