UBUNTU-CVE-2026-71225

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-71225
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-71225
Upstream
  • CVE-2026-71225
Published
2026-08-06T00:00:00Z
Modified
2026-08-06T22:15:43.919379771Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in libkcapi. When performing one-shot symmetric cipher operations on large inputs (over 64 KiB) in stateful modes such as Counter (CTR) or Cipher Block Chaining (CBC), the library improperly reuses the Initialization Vector (IV) for each internal data chunk. A remote attacker could potentially exploit this by making an application that uses libkcapi process specially crafted large inputs. This can lead to a significant weakening of data confidentiality, as the repeated IV use can expose relationships in encrypted plaintext, and may also affect data integrity by causing incorrect cryptographic processing.

References

Affected packages

Ubuntu:18.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.0.0-2
1.0.1-1
1.0.2-1
1.0.3-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kcapi-tools",
            "binary_version": "1.0.3-2"
        },
        {
            "binary_name": "libkcapi1",
            "binary_version": "1.0.3-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
Ubuntu:20.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.1.3-1
1.1.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kcapi-tools",
            "binary_version": "1.1.5-1"
        },
        {
            "binary_name": "libkcapi1",
            "binary_version": "1.1.5-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
Ubuntu:22.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.2.1-1
1.3.1-1
1.3.1-2
1.3.1-3
1.4.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kcapi-tools",
            "binary_version": "1.4.0-1"
        },
        {
            "binary_name": "libkcapi1",
            "binary_version": "1.4.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
Ubuntu:24.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.4.0-1ubuntu3
1.4.0-1ubuntu4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kcapi-tools",
            "binary_version": "1.4.0-1ubuntu4"
        },
        {
            "binary_name": "libkcapi1",
            "binary_version": "1.4.0-1ubuntu4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
Ubuntu:26.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.4.0-1ubuntu4
1.4.0-1ubuntu5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kcapi-tools",
            "binary_version": "1.4.0-1ubuntu5"
        },
        {
            "binary_name": "libkcapi1",
            "binary_version": "1.4.0-1ubuntu5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
Ubuntu:Pro:FIPS-preview:22.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=fips-preview%2Fjammy

Affected ranges

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

Affected versions

1.*
1.4.0-1ubuntu0.1~Fips1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kcapi-tools",
            "binary_version": "1.4.0-1ubuntu0.1~Fips1"
        },
        {
            "binary_name": "libkcapi1",
            "binary_version": "1.4.0-1ubuntu0.1~Fips1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
Ubuntu:Pro:FIPS-updates:18.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=fips-updates%2Fbionic

Affected ranges

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

Affected versions

1.*
1.0.3-2fips3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kcapi-tools",
            "binary_version": "1.0.3-2fips3"
        },
        {
            "binary_name": "libkcapi1",
            "binary_version": "1.0.3-2fips3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
Ubuntu:Pro:FIPS-updates:20.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=fips-updates%2Ffocal

Affected ranges

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

Affected versions

1.*
1.1.5-1fips1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kcapi-tools",
            "binary_version": "1.1.5-1fips1"
        },
        {
            "binary_name": "libkcapi1",
            "binary_version": "1.1.5-1fips1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
Ubuntu:Pro:FIPS-updates:22.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=fips-updates%2Fjammy

Affected ranges

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

Affected versions

1.*
1.4.0-1ubuntu0.1~Fips1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kcapi-tools",
            "binary_version": "1.4.0-1ubuntu0.1~Fips1"
        },
        {
            "binary_name": "libkcapi1",
            "binary_version": "1.4.0-1ubuntu0.1~Fips1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
Ubuntu:Pro:FIPS:16.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=fips-updates%2Fxenial

Affected ranges

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

Affected versions

0.*
0.13.0-0ubuntu1~ppa1
0.13.0-0ubuntu1~ppa2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libkcapi-bin",
            "binary_version": "0.13.0-0ubuntu1~ppa2"
        },
        {
            "binary_name": "libkcapi0",
            "binary_version": "0.13.0-0ubuntu1~ppa2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=fips%2Fxenial

Affected ranges

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

Affected versions

0.*
0.13.0-0ubuntu1~ppa1
0.13.0-0ubuntu1~ppa2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libkcapi-bin",
            "binary_version": "0.13.0-0ubuntu1~ppa2"
        },
        {
            "binary_name": "libkcapi0",
            "binary_version": "0.13.0-0ubuntu1~ppa2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
Ubuntu:Pro:FIPS:18.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=fips%2Fbionic

Affected ranges

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

Affected versions

1.*
1.0.3-2fips3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kcapi-tools",
            "binary_version": "1.0.3-2fips3"
        },
        {
            "binary_name": "libkcapi1",
            "binary_version": "1.0.3-2fips3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"
Ubuntu:Pro:FIPS:20.04:LTS
libkcapi

Package

Name
libkcapi
Purl
pkg:deb/ubuntu/libkcapi?arch=source&distro=fips%2Ffocal

Affected ranges

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

Affected versions

1.*
1.1.5-1fips1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kcapi-tools",
            "binary_version": "1.1.5-1fips1"
        },
        {
            "binary_name": "libkcapi1",
            "binary_version": "1.1.5-1fips1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71225.json"