UBUNTU-CVE-2026-54500

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Source
https://ubuntu.com/security/CVE-2026-54500
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54500.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-54500
Upstream
Published
2026-07-01T00:16:00Z
Modified
2026-07-01T23:43:25.446764224Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.3, Oj.load in :object mode reads uninitialized stack memory (and, for long keys, reads out of bounds) when parsing a JSON object whose key is 254 bytes or longer. The interned bytes can surface to the caller, disclosing process stack memory. In ext/oj/intern.c, formattr() handles the long-key path by allocating a heap buffer, b, populating it with the attribute name, and then freeing it — but it passed the uninitialized stack buffer buf (not b) to rbintern3(). rb_intern3 therefore reads len + 1 bytes of uninitialized stack memory. When the key length is >= 256, it also reads out of bounds past the 256-byte buf. The resulting bytes are interned and can reach the caller via the produced Symbol or via the EncodingError message raised on invalid UTF-8, leaking process stack contents. This issue has been fixed in version 3.17.3.

References

Affected packages

Ubuntu:14.04:LTS
ruby-oj

Package

Name
ruby-oj
Purl
pkg:deb/ubuntu/ruby-oj?arch=source&distro=trusty

Affected ranges

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

Affected versions

2.*
2.0.10-1
2.1.4-1
2.4.0-1
2.5.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-oj",
            "binary_version": "2.5.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54500.json"
Ubuntu:16.04:LTS
ruby-oj

Package

Name
ruby-oj
Purl
pkg:deb/ubuntu/ruby-oj?arch=source&distro=xenial

Affected ranges

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

Affected versions

2.*
2.12.10-3
2.12.10-3build1
2.12.10-4
2.12.10-4build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-oj",
            "binary_version": "2.12.10-4build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54500.json"
Ubuntu:18.04:LTS
ruby-oj

Package

Name
ruby-oj
Purl
pkg:deb/ubuntu/ruby-oj?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*
2.17.4-1
3.*
3.4.0-1
3.4.0-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-oj",
            "binary_version": "3.4.0-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54500.json"
Ubuntu:20.04:LTS
ruby-oj

Package

Name
ruby-oj
Purl
pkg:deb/ubuntu/ruby-oj?arch=source&distro=focal

Affected ranges

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

Affected versions

3.*
3.8.1-1
3.9.1-1
3.9.2-1
3.10.1-1
3.10.1-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-oj",
            "binary_version": "3.10.1-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54500.json"
Ubuntu:22.04:LTS
ruby-oj

Package

Name
ruby-oj
Purl
pkg:deb/ubuntu/ruby-oj?arch=source&distro=jammy

Affected ranges

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

Affected versions

3.*
3.11.0-1
3.13.7-1
3.13.7-1build1
3.13.9-1
3.13.9-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-oj",
            "binary_version": "3.13.9-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54500.json"
Ubuntu:24.04:LTS
ruby-oj

Package

Name
ruby-oj
Purl
pkg:deb/ubuntu/ruby-oj?arch=source&distro=noble

Affected ranges

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

Affected versions

3.*
3.15.0-1
3.16.1-1
3.16.3-1
3.16.3-1build1
3.16.3-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-oj",
            "binary_version": "3.16.3-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54500.json"
Ubuntu:25.10
ruby-oj

Package

Name
ruby-oj
Purl
pkg:deb/ubuntu/ruby-oj?arch=source&distro=questing

Affected ranges

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

Affected versions

3.*
3.16.3-1build3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-oj",
            "binary_version": "3.16.3-1build3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54500.json"
Ubuntu:26.04:LTS
ruby-oj

Package

Name
ruby-oj
Purl
pkg:deb/ubuntu/ruby-oj?arch=source&distro=resolute

Affected ranges

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

Affected versions

3.*
3.16.3-1build3
3.16.12-1
3.16.15-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-oj",
            "binary_version": "3.16.15-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54500.json"