CVE-2026-63575

See a problem?
Please try reporting it to the source first.

Source

https://cve.org/CVERecord?id=CVE-2026-63575

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63575.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-63575

Published

2026-10-02T07:06:31Z

Modified

2026-10-04T02:46:54Z

Severity

7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

PKCS#12 key derivation loops about 2^32 times on a zero or negative iteration count

Details

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.

Database specific

{
    "cna_assigner":  "bcorg",
    "cwe_ids":  [
        "CWE-835"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63575.json"
}

References

Affected packages

Git / github.com/bcgit/bc-csharp

Affected ranges

Type

GIT

Repo

https://github.com/bcgit/bc-csharp

Events

Introduced

Fixed

4007498b13582d90ee1eda5d9920c324428b98b3

Fixed

0c7a6dfd64c4a479577e35a728a766721b79aba7

Fixed

7c0ed15f9783c9595b1a53f3900136461fd944f4

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "2.7.0"
        }
    ],
    "source":  [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

release-1.*

release-1.8.0

release-1.8.0-RC.1

release-1.8.0-RC.2

release-1.8.0-RC.3

release-1.8.0-beta.1

release-1.8.0-beta.2

release-1.8.0-beta.3

release-1.8.0-beta.4

release-1.8.1

release-1.8.10

release-1.8.2

release-1.8.3

release-1.8.4

release-1.8.5

release-1.8.6

release-1.8.7

release-1.8.8

release-1.9.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63575.json"