{"id":"CVE-2026-63575","published":"2026-10-02T08:17:02.643","lastModified":"2026-10-02T20:17:03.583","description":"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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-835"],"vendors":[],"products":[],"references":[{"url":"https://github.com/bcgit/bc-csharp/commit/0c7a6dfd64c4a479577e35a728a766721b79aba7","tags":[]},{"url":"https://github.com/bcgit/bc-csharp/commit/7c0ed15f9783c9595b1a53f3900136461fd944f4","tags":[]},{"url":"https://github.com/bcgit/bc-csharp/wiki/CVE-2026-63575","tags":[]}],"exploitRefs":[{"url":"https://github.com/bcgit/bc-csharp/commit/0c7a6dfd64c4a479577e35a728a766721b79aba7","tags":[]},{"url":"https://github.com/bcgit/bc-csharp/commit/7c0ed15f9783c9595b1a53f3900136461fd944f4","tags":[]},{"url":"https://github.com/bcgit/bc-csharp/wiki/CVE-2026-63575","tags":[]}],"hasPoc":true,"ai":null}