Skip to content
Heist/ feed
Unrated

DEBIAN-CVE-2026-44894

Type: advisorySource: OSV1 source record

Netty is a network application framework for development of protocol servers and clients. NoQuicTokenHandler is the tokenHandler used when the application does not set one. Prior to version 4.2.15.Final, its writeToken() returns false (server will not send Retry — acceptable), but validateToken() unconditionally `return 0`. In QuicheQuicServerCodec.handlePacket(), a non-negative return from validateToken() is interpreted as 'token is valid, ODCID starts at offset 0', causing the server to call quiche_accept as if the client's address had been validated by a Retry round-trip. Per RFC 9000 §8.1, a validated address lifts the 3× anti-amplification send limit. Thus any attacker who includes ANY non-empty token bytes in an Initial packet — with a spoofed victim source IP — causes the Netty server to treat the victim as validated and reflect full-size handshake flights (certificates, etc.) toward it without the 3× cap. The correct 'no token handler' semantics would be to return -1 (invalid) so the normal un-validated path and amplification limit apply. Version 4.2.15.Final patches the issue.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-44894

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-2026-44894

netty

Source reference: /affected/0/package/name

Affected versions
1:4.1.48-10

Source reference: /affected/0/versions

1:4.1.48-11

Source reference: /affected/0/versions

1:4.1.48-12

Source reference: /affected/0/versions

1:4.1.48-13

Source reference: /affected/0/versions

1:4.1.48-14

Source reference: /affected/0/versions

1:4.1.48-15

Source reference: /affected/0/versions

1:4.1.48-16

Source reference: /affected/0/versions

1:4.1.48-7

Source reference: /affected/0/versions

1:4.1.48-7+deb12u1

Source reference: /affected/0/versions

1:4.1.48-7+deb12u2

Source reference: /affected/0/versions

1:4.1.48-8

Source reference: /affected/0/versions

1:4.1.48-9

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

netty

Source reference: /affected/1/package/name

Affected versions
1:4.1.48-10

Source reference: /affected/1/versions

1:4.1.48-10+deb13u1

Source reference: /affected/1/versions

1:4.1.48-11

Source reference: /affected/1/versions

1:4.1.48-12

Source reference: /affected/1/versions

1:4.1.48-13

Source reference: /affected/1/versions

1:4.1.48-14

Source reference: /affected/1/versions

1:4.1.48-15

Source reference: /affected/1/versions

1:4.1.48-16

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

netty

Source reference: /affected/2/package/name

Affected versions
1:4.1.48-10

Source reference: /affected/2/versions

1:4.1.48-11

Source reference: /affected/2/versions

1:4.1.48-12

Source reference: /affected/2/versions

1:4.1.48-13

Source reference: /affected/2/versions

1:4.1.48-14

Source reference: /affected/2/versions

1:4.1.48-15

Source reference: /affected/2/versions

1:4.1.48-16

Source reference: /affected/2/versions

Fixed versions
Not stated in this record
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"
          }
        ]
      }
    ],
    "package": {
      "name": "netty",
      "purl": "pkg:deb/debian/netty?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "1:4.1.48-10",
      "1:4.1.48-11",
      "1:4.1.48-12",
      "1:4.1.48-13",
      "1:4.1.48-14",
      "1:4.1.48-15",
      "1:4.1.48-16",
      "1:4.1.48-7",
      "1:4.1.48-7+deb12u1",
      "1:4.1.48-7+deb12u2",
      "1:4.1.48-8",
      "1:4.1.48-9"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44894.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "netty",
      "purl": "pkg:deb/debian/netty?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1:4.1.48-10",
      "1:4.1.48-10+deb13u1",
      "1:4.1.48-11",
      "1:4.1.48-12",
      "1:4.1.48-13",
      "1:4.1.48-14",
      "1:4.1.48-15",
      "1:4.1.48-16"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44894.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "netty",
      "purl": "pkg:deb/debian/netty?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1:4.1.48-10",
      "1:4.1.48-11",
      "1:4.1.48-12",
      "1:4.1.48-13",
      "1:4.1.48-14",
      "1:4.1.48-15",
      "1:4.1.48-16"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44894.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56509 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement