Skip to content
Heist/ feed
UnratedFix available

DEBIAN-CVE-2026-54500

Type: advisorySource: OSV1 source record

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, form_attr() 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 rb_intern3(). 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.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-54500

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-2026-54500

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/versions

3.16.15-1

Source reference: /affected/2/versions

3.16.16-1

Source reference: /affected/2/versions

3.16.3-1

Source reference: /affected/2/versions

3.17.0-1

Source reference: /affected/2/versions

3.17.1-1

Source reference: /affected/2/versions

Fixed versions
3.17.3-1

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-2026-54500.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-2026-54500.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.17.3-1"
          }
        ]
      }
    ],
    "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"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54500.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57323 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement