UBUNTU-CVE-2026-42483

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Source
https://ubuntu.com/security/CVE-2026-42483
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-42483
Upstream
  • CVE-2026-42483
Published
2026-05-01T14:16:00Z
Modified
2026-05-20T16:25:43.836572265Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 7.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted Kerberos hash file. The issue affects modulehashdecode in multiple Kerberos-related modules because accountinfolen is calculated from untrusted delimiter positions without upper-bound validation before memcpy copies the data into a fixed-size account_info buffer.

References

Affected packages

Ubuntu:18.04:LTS
hashcat

Package

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

Affected ranges

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

Affected versions

3.*
3.60-1
4.*
4.0.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hashcat",
            "binary_version": "4.0.1-1"
        },
        {
            "binary_name": "hashcat-data",
            "binary_version": "4.0.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"
Ubuntu:20.04:LTS
hashcat

Package

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

Affected ranges

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

Affected versions

5.*
5.1.0+ds1-1
5.1.0+ds1-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hashcat",
            "binary_version": "5.1.0+ds1-2"
        },
        {
            "binary_name": "hashcat-data",
            "binary_version": "5.1.0+ds1-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"
Ubuntu:22.04:LTS
hashcat

Package

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

Affected ranges

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

Affected versions

6.*
6.1.1+ds1-1
6.2.5+ds1-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hashcat",
            "binary_version": "6.2.5+ds1-2"
        },
        {
            "binary_name": "hashcat-data",
            "binary_version": "6.2.5+ds1-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"
Ubuntu:24.04:LTS
hashcat

Package

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

Affected ranges

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

Affected versions

6.*
6.2.6+ds1-1
6.2.6+ds1-1build1
6.2.6+ds1-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hashcat",
            "binary_version": "6.2.6+ds1-1build2"
        },
        {
            "binary_name": "hashcat-data",
            "binary_version": "6.2.6+ds1-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"
Ubuntu:25.10
hashcat

Package

Name
hashcat
Purl
pkg:deb/ubuntu/hashcat?arch=source&distro=questing

Affected ranges

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

Affected versions

6.*
6.2.6+ds2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hashcat",
            "binary_version": "6.2.6+ds2-1"
        },
        {
            "binary_name": "hashcat-data",
            "binary_version": "6.2.6+ds2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"
Ubuntu:26.04:LTS
hashcat

Package

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

Affected ranges

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

Affected versions

6.*
6.2.6+ds2-1
7.*
7.1.2+ds1-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hashcat",
            "binary_version": "7.1.2+ds1-3"
        },
        {
            "binary_name": "hashcat-data",
            "binary_version": "7.1.2+ds1-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42483.json"