UBUNTU-CVE-2026-54592

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Source
https://ubuntu.com/security/CVE-2026-54592
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54592.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-54592
Upstream
Published
2026-07-01T00:16:00Z
Modified
2026-07-01T23:35:51.505713552Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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::Doc#eachchild, when invoked recursively over a deeply nested JSON document, overflows a fixed-size stack buffer and aborts the process, leading to DoS. In a two-step chain in ext/oj/fast.c, doceachchild increments doc->where past the wherepath[MAXSTACK = 100] array with no bounds check and never restores it (the doc->where-- is missing), so calling eachchild recursively from inside the yield block drives doc->where beyond the array. On the next entry the function copies the path into the 800-byte stack-local buffer savepath[MAXSTACK] using wlen = doc->where - doc->wherepath, so when the previous recursive call left doc->where past wherepath[100] the wlen exceeds MAXSTACK and the memcpy overflows savepath on the C stack; because the Oj::Doc parser imposes no JSON nesting-depth limit (relying on a C-stack pressure check), deeply nested attacker input reaches this path. 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-2026-54592.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-2026-54592.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-2026-54592.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-2026-54592.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-2026-54592.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-2026-54592.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-2026-54592.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-2026-54592.json"