UnratedFix available

DEBIAN-CVE-2026-3238

Type: advisorySource: OSV1 source record

A flaw was found in Samba’s WINS server component when running as an Active Directory Domain Controller. The WINS protocol handlers for certain request types did not properly validate incoming packets, allowing an unauthenticated remote attacker to trigger a NULL pointer dereference and crash the WINS service using specially crafted UDP packets.

Announced 8 Jun 2026Source revision 1

Original source ↗

DEBIAN-CVE-2026-3238

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-2026-3238

samba

Source reference: /affected/0/package/name

Affected versions: 2:4.17.10+dfsg-0+deb12u1
Source reference: /affected/0/versions
2:4.17.10+dfsg-0+deb12u1~bpo11+1
Source reference: /affected/0/versions
2:4.17.11+dfsg-0+deb12u1
Source reference: /affected/0/versions
2:4.17.12+dfsg-0+deb12u1
Source reference: /affected/0/versions
2:4.17.12+dfsg-0+deb12u1~bpo11+1
Source reference: /affected/0/versions
2:4.17.12+dfsg-0+deb12u2
Source reference: /affected/0/versions
2:4.17.12+dfsg-0+deb12u3
Source reference: /affected/0/versions
2:4.17.8+dfsg-2
Source reference: /affected/0/versions
2:4.17.8+dfsg-2.1
Source reference: /affected/0/versions
2:4.17.9+dfsg-0+deb12u1
Source reference: /affected/0/versions
2:4.17.9+dfsg-0+deb12u2
Source reference: /affected/0/versions
2:4.17.9+dfsg-0+deb12u3
Source reference: /affected/0/versions
2:4.17.9+dfsg-0+deb12u3~bpo11+1
Source reference: /affected/0/versions
Fixed versions: 2:4.17.12+dfsg-0+deb12u4
Source reference: /affected/0/ranges
Prerequisites: Not stated in this record

samba

Source reference: /affected/1/package/name

Affected versions: 2:4.22.3+dfsg-4
Source reference: /affected/1/versions
2:4.22.4+dfsg-1
Source reference: /affected/1/versions
2:4.22.4+dfsg-1~deb13u1
Source reference: /affected/1/versions
2:4.22.4+dfsg-1~deb13u1~bpo12+1
Source reference: /affected/1/versions
2:4.22.6+dfsg-0+deb13u1
Source reference: /affected/1/versions
2:4.22.6+dfsg-0+deb13u1~bpo12+1
Source reference: /affected/1/versions
2:4.22.8+dfsg-0+deb13u1
Source reference: /affected/1/versions
Fixed versions: 2:4.22.8+dfsg-0+deb13u2
Source reference: /affected/1/ranges
Prerequisites: Not stated in this record

samba

Source reference: /affected/2/package/name

Affected versions: 2:4.22.3+dfsg-4
Source reference: /affected/2/versions
2:4.22.4+dfsg-1
Source reference: /affected/2/versions
2:4.22.4+dfsg-1~deb13u1
Source reference: /affected/2/versions
2:4.22.4+dfsg-1~deb13u1~bpo12+1
Source reference: /affected/2/versions
2:4.23.0+dfsg-1
Source reference: /affected/2/versions
2:4.23.0+dfsg-2
Source reference: /affected/2/versions
2:4.23.0+dfsg-3
Source reference: /affected/2/versions
2:4.23.0~rc1+dfsg-1
Source reference: /affected/2/versions
2:4.23.0~rc2+dfsg-1
Source reference: /affected/2/versions
2:4.23.0~rc3+dfsg-1
Source reference: /affected/2/versions
2:4.23.1+dfsg-1
Source reference: /affected/2/versions
2:4.23.2+dfsg-1
Source reference: /affected/2/versions
2:4.23.3+dfsg-1
Source reference: /affected/2/versions
2:4.23.3+dfsg-1~bpo13+1
Source reference: /affected/2/versions
2:4.23.4+dfsg-1
Source reference: /affected/2/versions
2:4.23.4+dfsg-1~bpo13+1
Source reference: /affected/2/versions
2:4.23.5+dfsg-1
Source reference: /affected/2/versions
2:4.23.5+dfsg-1~bpo13+1
Source reference: /affected/2/versions
2:4.23.6+dfsg-1
Source reference: /affected/2/versions
2:4.23.6+dfsg-2
Source reference: /affected/2/versions
2:4.23.6+dfsg-2~bpo13+1
Source reference: /affected/2/versions
2:4.24.0+dfsg-1
Source reference: /affected/2/versions
2:4.24.0~rc1+dfsg-1
Source reference: /affected/2/versions
2:4.24.0~rc1+dfsg-2
Source reference: /affected/2/versions
2:4.24.0~rc1+dfsg-3
Source reference: /affected/2/versions
2:4.24.0~rc2+dfsg-1
Source reference: /affected/2/versions
2:4.24.1+dfsg-1
Source reference: /affected/2/versions
2:4.24.2+dfsg-1
Source reference: /affected/2/versions
2:4.24.2+dfsg-1~bpo13+1
Source reference: /affected/2/versions
2:4.24.3+dfsg-1~bpo13+1
Source reference: /affected/2/versions
Fixed versions: 2:4.24.3+dfsg-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": "2:4.17.12+dfsg-0+deb12u4"
          }
        ]
      }
    ],
    "package": {
      "name": "samba",
      "purl": "pkg:deb/debian/samba?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "2:4.17.10+dfsg-0+deb12u1",
      "2:4.17.10+dfsg-0+deb12u1~bpo11+1",
      "2:4.17.11+dfsg-0+deb12u1",
      "2:4.17.12+dfsg-0+deb12u1",
      "2:4.17.12+dfsg-0+deb12u1~bpo11+1",
      "2:4.17.12+dfsg-0+deb12u2",
      "2:4.17.12+dfsg-0+deb12u3",
      "2:4.17.8+dfsg-2",
      "2:4.17.8+dfsg-2.1",
      "2:4.17.9+dfsg-0+deb12u1",
      "2:4.17.9+dfsg-0+deb12u2",
      "2:4.17.9+dfsg-0+deb12u3",
      "2:4.17.9+dfsg-0+deb12u3~bpo11+1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3238.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2:4.22.8+dfsg-0+deb13u2"
          }
        ]
      }
    ],
    "package": {
      "name": "samba",
      "purl": "pkg:deb/debian/samba?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "2:4.22.3+dfsg-4",
      "2:4.22.4+dfsg-1",
      "2:4.22.4+dfsg-1~deb13u1",
      "2:4.22.4+dfsg-1~deb13u1~bpo12+1",
      "2:4.22.6+dfsg-0+deb13u1",
      "2:4.22.6+dfsg-0+deb13u1~bpo12+1",
      "2:4.22.8+dfsg-0+deb13u1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3238.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2:4.24.3+dfsg-1"
          }
        ]
      }
    ],
    "package": {
      "name": "samba",
      "purl": "pkg:deb/debian/samba?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "2:4.22.3+dfsg-4",
      "2:4.22.4+dfsg-1",
      "2:4.22.4+dfsg-1~deb13u1",
      "2:4.22.4+dfsg-1~deb13u1~bpo12+1",
      "2:4.23.0+dfsg-1",
      "2:4.23.0+dfsg-2",
      "2:4.23.0+dfsg-3",
      "2:4.23.0~rc1+dfsg-1",
      "2:4.23.0~rc2+dfsg-1",
      "2:4.23.0~rc3+dfsg-1",
      "2:4.23.1+dfsg-1",
      "2:4.23.2+dfsg-1",
      "2:4.23.3+dfsg-1",
      "2:4.23.3+dfsg-1~bpo13+1",
      "2:4.23.4+dfsg-1",
      "2:4.23.4+dfsg-1~bpo13+1",
      "2:4.23.5+dfsg-1",
      "2:4.23.5+dfsg-1~bpo13+1",
      "2:4.23.6+dfsg-1",
      "2:4.23.6+dfsg-2",
      "2:4.23.6+dfsg-2~bpo13+1",
      "2:4.24.0+dfsg-1",
      "2:4.24.0~rc1+dfsg-1",
      "2:4.24.0~rc1+dfsg-2",
      "2:4.24.0~rc1+dfsg-3",
      "2:4.24.0~rc2+dfsg-1",
      "2:4.24.1+dfsg-1",
      "2:4.24.2+dfsg-1",
      "2:4.24.2+dfsg-1~bpo13+1",
      "2:4.24.3+dfsg-1~bpo13+1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3238.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #57597 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 17:21:20 GMT
Publisher date: Mon, 08 Jun 2026 09:16:30 GMT

Read the original announcement