DEBIAN-CVE-2026-54902
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, is vulnerable to Use-After-Free when in SAJ mode. The Oj::Parser does not protect cached object keys (≥ 35 bytes) from garbage collection, and a Ruby callback that triggers GC inside hash_end can cause the key string to be reclaimed while the C parser still holds a pointer to it. The subsequent access to the freed string VALUE results in a segfault, confirmed by an RIP pointing to address 0x4242 (a canary-style pattern suggesting control over the freed memory's content). This issue has been fixed in version 3.17.2.
DEBIAN-CVE-2026-54902
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-54902
ruby-oj
Source reference: /affected/0/package/name
- Affected versions
- 3.14.2-1
Source reference:
/affected/0/versions - Fixed versions
- 3.14.2-1+deb12u1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
ruby-oj
Source reference: /affected/1/package/name
- Affected versions
- 3.16.3-1
Source reference:
/affected/1/versions - Fixed versions
- 3.16.3-1+deb13u1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
ruby-oj
Source reference: /affected/2/package/name
- Affected versions
- 3.16.12-1
Source reference:
/affected/2/versions3.16.15-1Source reference:
/affected/2/versions3.16.16-1Source reference:
/affected/2/versions3.16.3-1Source reference:
/affected/2/versions3.17.0-1Source reference:
/affected/2/versions3.17.1-1Source reference:
/affected/2/versions3.17.3-1Source reference:
/affected/2/versions3.17.4-1Source reference:
/affected/2/versions3.17.6-1Source reference:
/affected/2/versions - Fixed versions
- 3.17.6-2
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.14.2-1+deb12u1"
}
]
}
],
"package": {
"name": "ruby-oj",
"purl": "pkg:deb/debian/ruby-oj?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.14.2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54902.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.16.3-1+deb13u1"
}
]
}
],
"package": {
"name": "ruby-oj",
"purl": "pkg:deb/debian/ruby-oj?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.16.3-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54902.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.17.6-2"
}
]
}
],
"package": {
"name": "ruby-oj",
"purl": "pkg:deb/debian/ruby-oj?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.16.12-1",
"3.16.15-1",
"3.16.16-1",
"3.16.3-1",
"3.17.0-1",
"3.17.1-1",
"3.17.3-1",
"3.17.4-1",
"3.17.6-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54902.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57855 · Revision 1
- Added to Heist Feed
- Publisher date