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CVE-2026-5598

CVE-2026-5598 · Non-constant time comparisons risk private key leakage in FrodoKEM.

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.9 · High · EPSS 0.9% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • bc-java

    Versions
    • ≥ 1.71, < 1.80.2: Affected (maven)
    • ≥ 1.81, < 1.81.1: Affected (maven)
    • ≥ 1.82, < 1.84: Affected (maven)

    Update to 1.80.2; Update to 1.81.1; Update to 1.84

  • bouncycastle Debian:12

    Versions
    • 1.72-2
    • 1.77-1
    • 1.80-1
    • 1.80-2
    • 1.80-3
    • 1.86-1
    • 1.86.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • bouncycastle Debian:13

    Versions
    • 1.80-3
    • 1.86-1
    • 1.86.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • bouncycastle Debian:14

    Versions
    • 1.80-3
    Affected ranges
    • ECOSYSTEM: < 1.86-1

    Update to 1.86-1

  • bouncycastle Ubuntu:Pro:16.04:LTS

    Versions
    • 1.49+dfsg-3ubuntu1
    • 1.51-4ubuntu1
    • 1.51-4ubuntu1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • bouncycastle Ubuntu:Pro:18.04:LTS

    Versions
    • 1.57-1
    • 1.58-1
    • 1.59-1
    • 1.59-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • bouncycastle Ubuntu:Pro:20.04:LTS

    Versions
    • 1.61-1
    • 1.61-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • bouncycastle Ubuntu:Pro:22.04:LTS

    Versions
    • 1.68-2
    • 1.68-4
    • 1.68-5
    • 1.68-5ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • bouncycastle Ubuntu:Pro:24.04:LTS

    Versions
    • 1.72-2
    • 1.77-1
    • 1.77-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • bouncycastle Ubuntu:25.10

    Versions
    • 1.77-1
    • 1.80-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • bouncycastle Ubuntu:26.10

    Versions
    • 1.80-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • bouncycastle Ubuntu:26.04:LTS

    Versions
    • 1.80-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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