CVE-2026-5598
Non-constant time comparisons risk private key leakage in FrodoKEM.
- State
- Published
- Severity
- 8.9 High
- Published
- Apr 15, 2026
- Updated
- Sep 18, 2026
- Reserved
- Apr 5, 2026
Description
Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules).
This vulnerability is associated with program files FrodoEngine.Java.
This issue affects BC-JAVA: from 1.71 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.9 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U/S:P/AU:Y/U:Red | bcorg |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | redhat-SADP |
Weaknesses
- CWE-385 Covert timing channel
Affected Products
| Product | Versions |
|---|---|
BC-JAVALegion of the Bouncy Castle Inc. |
|
References
- https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905598vendor-advisory
- https://github.com/bcgit/bc-java/commit/94abbd56413dfdac651fd878bc60253871ef5e87patch
- https://github.com/bcgit/bc-java/commit/8692e6b2b191fc4aafa32545c7a78bdb9bf110c5patch
- https://access.redhat.com/security/cve/CVE-2026-5598vdb-entry
- RHBZ#2458635issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5598.json
- https://access.redhat.com/errata/RHSA-2026:53644vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:12267vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:53645vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:18054vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:53646vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:18055vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:12269vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:18059vendor-advisory
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