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DEBIAN-CVE-2026-16028

Type: advisorySource: OSV1 source record

Protocol::HTTP2 versions before 1.14 for Perl allow memory exhaustion via closed streams that stream_state never removes from the connection stream table. When a stream reaches the CLOSED state, stream_state returns the concurrency slot and clears most of the stream's keys, but the entry itself stays in the connection stream table and nothing in the distribution removes it. Stream identifiers increase monotonically, so a peer can open and close streams on one connection indefinitely, each close leaving a residual entry that is retained for the life of the connection. SETTINGS_MAX_CONCURRENT_STREAMS does not bound this. That setting caps how many streams are live at once and is enforced, while the growth is made of streams the cap has already released, so it accumulates with concurrency never exceeding one. The client keeps the same table and grows the same way against a hostile server. Measured against a server built on this module, roughly 920 bytes are retained per closed stream for about 19 bytes on the wire, so 100,000 sequential streams on one connection grow server resident memory by about 88 MiB. The streams are ordinary requests that the application accepts and completes.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-16028

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-2026-16028

libprotocol-http2-perl

Source reference: /affected/0/package/name

Affected versions
1.10-2

Source reference: /affected/0/versions

1.10-3

Source reference: /affected/0/versions

1.11-1

Source reference: /affected/0/versions

1.12-1

Source reference: /affected/0/versions

1.12-2

Source reference: /affected/0/versions

1.13-1

Source reference: /affected/0/versions

1.14-1

Source reference: /affected/0/versions

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

libprotocol-http2-perl

Source reference: /affected/1/package/name

Affected versions
1.11-1

Source reference: /affected/1/versions

1.12-1

Source reference: /affected/1/versions

1.12-2

Source reference: /affected/1/versions

1.13-1

Source reference: /affected/1/versions

1.14-1

Source reference: /affected/1/versions

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

libprotocol-http2-perl

Source reference: /affected/2/package/name

Affected versions
1.11-1

Source reference: /affected/2/versions

1.12-1

Source reference: /affected/2/versions

1.12-2

Source reference: /affected/2/versions

1.13-1

Source reference: /affected/2/versions

Fixed versions
1.14-1

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"
          }
        ]
      }
    ],
    "package": {
      "name": "libprotocol-http2-perl",
      "purl": "pkg:deb/debian/libprotocol-http2-perl?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "1.10-2",
      "1.10-3",
      "1.11-1",
      "1.12-1",
      "1.12-2",
      "1.13-1",
      "1.14-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-16028.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "libprotocol-http2-perl",
      "purl": "pkg:deb/debian/libprotocol-http2-perl?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1.11-1",
      "1.12-1",
      "1.12-2",
      "1.13-1",
      "1.14-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-16028.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.14-1"
          }
        ]
      }
    ],
    "package": {
      "name": "libprotocol-http2-perl",
      "purl": "pkg:deb/debian/libprotocol-http2-perl?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1.11-1",
      "1.12-1",
      "1.12-2",
      "1.13-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-16028.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#55543 · Revision 1
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Publisher date
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