Loop with unreachable exit condition in the PKCS#12 key derivation (Pkcs12ParametersGenerator) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply a PKCS#12 (PFX) file, or a PKCS#8 encrypted private key that uses a PKCS#12 password-based encryption algorithm, to cause a denial of service through CPU exhaustion via an iteration count of zero or below, because the derivation loop ran until its counter equalled the count, so for such a count it wrapped through about 2^32 iterations before the MAC or the password could be checked. A 75-byte PFX file with a negative MacData iteration count kept Pkcs12Store.Load busy for many minutes.
References
Configurations
History
28 Oct 2026, 14:41
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:bouncycastle:bc-csharp:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
| First Time |
Bouncycastle bc-csharp
Bouncycastle |
|
| References | () https://github.com/bcgit/bc-csharp/commit/0c7a6dfd64c4a479577e35a728a766721b79aba7 - Patch | |
| References | () https://github.com/bcgit/bc-csharp/commit/7c0ed15f9783c9595b1a53f3900136461fd944f4 - Patch | |
| References | () https://github.com/bcgit/bc-csharp/wiki/CVE-2026-63575 - Patch, Vendor Advisory |
02 Oct 2026, 08:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-10-02 08:17
Updated : 2026-10-28 14:41
NVD link : CVE-2026-63575
Mitre link : CVE-2026-63575
CVE.ORG link : CVE-2026-63575
JSON object : View
Products Affected
bouncycastle
- bc-csharp
CWE
CWE-835
Loop with Unreachable Exit Condition ('Infinite Loop')