CriticalFix available
ruby — security advisory
A double free was found in the Regexp compiler in Ruby 3.x before 3.0.4 and 3.1.x before 3.1.2. If a victim attempts to create a Regexp from untrusted user input, an attacker may be able to write to unexpected memory locations.
- Products
- ruby
- Affected versions
- Not specified
- Fixed versions
- 3.0.4-r0, 3.1.2-r0
- CVEs
- CVE-2022-28738
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:11 UTC · Revision 1
Source evidence
A double free was found in the Regexp compiler in Ruby 3.x before 3.0.4 and 3.1.x before 3.1.2. If a victim attempts to create a Regexp from untrusted user input, an attacker may be able to write to unexpected memory locations.
osv:ALPINE-CVE-2022-28738
ruby
Fixed versions: 3.0.4-r0
ruby
Fixed versions: 3.1.2-r0
ruby
Fixed versions: 3.1.2-r0
ruby
Fixed versions: 3.1.2-r0
ruby
Fixed versions: 3.1.2-r0
ruby
Fixed versions: 3.1.2-r0
ruby
Fixed versions: 3.1.2-r0
ruby
Fixed versions: 3.1.2-r0
ruby
Fixed versions: 3.1.2-r0
ruby
Fixed versions: 3.1.2-r0
Complete source record
{
"id": "e676fb0a9aecb2b8feadb02a614d1a2bd4a41bc2a076ba67099697119f561be3",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2022-28738",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2022-28738",
"summary": "A double free was found in the Regexp compiler in Ruby 3.x before 3.0.4 and 3.1.x before 3.1.2. If a victim attempts to create a Regexp from untrusted user input, an attacker may be able to write to unexpected memory locations.",
"evidence": "osv:ALPINE-CVE-2022-28738",
"products": [
{
"name": {
"value": "ruby",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.0.4-r0",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.2-r0",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.2-r0",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.2-r0",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.2-r0",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.2-r0",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.2-r0",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.2-r0",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.2-r0",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.1.2-r0",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "ALPINE-CVE-2022-28738",
"aliases": [
"ALPINE-CVE-2022-28738"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.0.4-r0"
}
]
}
],
"package": {
"name": "ruby",
"purl": "pkg:apk/alpine/ruby?arch=source",
"ecosystem": "Alpine:v3.15"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-28738.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.2-r0"
}
]
}
],
"package": {
"name": "ruby",
"purl": "pkg:apk/alpine/ruby?arch=source",
"ecosystem": "Alpine:v3.16"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-28738.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.2-r0"
}
]
}
],
"package": {
"name": "ruby",
"purl": "pkg:apk/alpine/ruby?arch=source",
"ecosystem": "Alpine:v3.17"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-28738.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.2-r0"
}
]
}
],
"package": {
"name": "ruby",
"purl": "pkg:apk/alpine/ruby?arch=source",
"ecosystem": "Alpine:v3.18"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-28738.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.2-r0"
}
]
}
],
"package": {
"name": "ruby",
"purl": "pkg:apk/alpine/ruby?arch=source",
"ecosystem": "Alpine:v3.19"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-28738.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.2-r0"
}
]
}
],
"package": {
"name": "ruby",
"purl": "pkg:apk/alpine/ruby?arch=source",
"ecosystem": "Alpine:v3.20"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-28738.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.2-r0"
}
]
}
],
"package": {
"name": "ruby",
"purl": "pkg:apk/alpine/ruby?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-28738.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.2-r0"
}
]
}
],
"package": {
"name": "ruby",
"purl": "pkg:apk/alpine/ruby?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-28738.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.2-r0"
}
]
}
],
"package": {
"name": "ruby",
"purl": "pkg:apk/alpine/ruby?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-28738.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.2-r0"
}
]
}
],
"package": {
"name": "ruby",
"purl": "pkg:apk/alpine/ruby?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-28738.json"
},
"ecosystem_specific": {}
}
],
"modified": "2026-10-15T07:17:54.200328838Z",
"provider": "osv",
"upstream": [
"CVE-2022-28738"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2022-28738"
]
},
"related_cves": [
{
"value": "CVE-2022-28738",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 321826,
"published_at": "2022-05-09T18:15:08.49+00:00"
}