UBUNTU-CVE-2026-5598

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Source
https://ubuntu.com/security/CVE-2026-5598
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5598.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-5598
Upstream
Published
2026-04-17T00:00:00Z
Modified
2026-04-27T20:21:00.863116Z
Severity
  • 8.9 (High) CVSS_V4 - 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 CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

(Covert timing channel vulnerability in Legion of the Bouncy Castle Inc ...)

References

Affected packages

Ubuntu:25.10
bouncycastle

Package

Name
bouncycastle
Purl
pkg:deb/ubuntu/bouncycastle@1.80-3?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.77-1
1.80-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcjmail-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcmail-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcpg-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcpkix-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcprov-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbctls-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcutil-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5598.json"
Ubuntu:26.04
bouncycastle

Package

Name
bouncycastle
Purl
pkg:deb/ubuntu/bouncycastle@1.80-3?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.80-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcjmail-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcmail-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcpg-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcpkix-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcprov-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbctls-java"
        },
        {
            "binary_version": "1.80-3",
            "binary_name": "libbcutil-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5598.json"
Ubuntu:Pro:16.04:LTS
bouncycastle

Package

Name
bouncycastle
Purl
pkg:deb/ubuntu/bouncycastle@1.51-4ubuntu1+esm1?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.49+dfsg-3ubuntu1
1.51-4ubuntu1
1.51-4ubuntu1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.51-4ubuntu1+esm1",
            "binary_name": "libbcmail-java"
        },
        {
            "binary_version": "1.51-4ubuntu1+esm1",
            "binary_name": "libbcpg-java"
        },
        {
            "binary_version": "1.51-4ubuntu1+esm1",
            "binary_name": "libbcpkix-java"
        },
        {
            "binary_version": "1.51-4ubuntu1+esm1",
            "binary_name": "libbcprov-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5598.json"
Ubuntu:Pro:18.04:LTS
bouncycastle

Package

Name
bouncycastle
Purl
pkg:deb/ubuntu/bouncycastle@1.59-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.57-1
1.58-1
1.59-1
1.59-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.59-1ubuntu0.1~esm1",
            "binary_name": "libbcmail-java"
        },
        {
            "binary_version": "1.59-1ubuntu0.1~esm1",
            "binary_name": "libbcpg-java"
        },
        {
            "binary_version": "1.59-1ubuntu0.1~esm1",
            "binary_name": "libbcpkix-java"
        },
        {
            "binary_version": "1.59-1ubuntu0.1~esm1",
            "binary_name": "libbcprov-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5598.json"
Ubuntu:Pro:20.04:LTS
bouncycastle

Package

Name
bouncycastle
Purl
pkg:deb/ubuntu/bouncycastle@1.61-1ubuntu0.1~esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.61-1
1.61-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.61-1ubuntu0.1~esm1",
            "binary_name": "libbcmail-java"
        },
        {
            "binary_version": "1.61-1ubuntu0.1~esm1",
            "binary_name": "libbcpg-java"
        },
        {
            "binary_version": "1.61-1ubuntu0.1~esm1",
            "binary_name": "libbcpkix-java"
        },
        {
            "binary_version": "1.61-1ubuntu0.1~esm1",
            "binary_name": "libbcprov-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5598.json"
Ubuntu:Pro:22.04:LTS
bouncycastle

Package

Name
bouncycastle
Purl
pkg:deb/ubuntu/bouncycastle@1.68-5ubuntu0.1~esm1?arch=source&distro=esm-apps/jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.68-2
1.68-4
1.68-5
1.68-5ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.68-5ubuntu0.1~esm1",
            "binary_name": "libbcmail-java"
        },
        {
            "binary_version": "1.68-5ubuntu0.1~esm1",
            "binary_name": "libbcpg-java"
        },
        {
            "binary_version": "1.68-5ubuntu0.1~esm1",
            "binary_name": "libbcpkix-java"
        },
        {
            "binary_version": "1.68-5ubuntu0.1~esm1",
            "binary_name": "libbcprov-java"
        },
        {
            "binary_version": "1.68-5ubuntu0.1~esm1",
            "binary_name": "libbctls-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5598.json"
Ubuntu:Pro:24.04:LTS
bouncycastle

Package

Name
bouncycastle
Purl
pkg:deb/ubuntu/bouncycastle@1.77-1ubuntu0.1~esm1?arch=source&distro=esm-apps/noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.72-2
1.77-1
1.77-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.77-1ubuntu0.1~esm1",
            "binary_name": "libbcjmail-java"
        },
        {
            "binary_version": "1.77-1ubuntu0.1~esm1",
            "binary_name": "libbcmail-java"
        },
        {
            "binary_version": "1.77-1ubuntu0.1~esm1",
            "binary_name": "libbcpg-java"
        },
        {
            "binary_version": "1.77-1ubuntu0.1~esm1",
            "binary_name": "libbcpkix-java"
        },
        {
            "binary_version": "1.77-1ubuntu0.1~esm1",
            "binary_name": "libbcprov-java"
        },
        {
            "binary_version": "1.77-1ubuntu0.1~esm1",
            "binary_name": "libbctls-java"
        },
        {
            "binary_version": "1.77-1ubuntu0.1~esm1",
            "binary_name": "libbcutil-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5598.json"