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DEBIAN-CVE-2026-73064

Type: advisorySource: OSV1 source record

In Mbed TLS 3.2.0 though 3.6.6 and 4.0.0 through 4.1.0, an attacker who can cause an entropy source to fail can remove or inject bytes into the start of the TLS stream. This only affects TLS 1.3 servers.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-73064

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-2026-73064

mbedtls

Source reference: /affected/0/package/name

Affected versions
2.28.3-1

Source reference: /affected/0/versions

2.28.4-1

Source reference: /affected/0/versions

2.28.5-1

Source reference: /affected/0/versions

2.28.6-1

Source reference: /affected/0/versions

2.28.7-1

Source reference: /affected/0/versions

2.28.7-1.1

Source reference: /affected/0/versions

2.28.7-1.1~exp1

Source reference: /affected/0/versions

2.28.8-1

Source reference: /affected/0/versions

3.6.0-1

Source reference: /affected/0/versions

3.6.0-2

Source reference: /affected/0/versions

3.6.0-3

Source reference: /affected/0/versions

3.6.2-1

Source reference: /affected/0/versions

3.6.2-2

Source reference: /affected/0/versions

3.6.2-3

Source reference: /affected/0/versions

3.6.3-1

Source reference: /affected/0/versions

3.6.4-1

Source reference: /affected/0/versions

3.6.4-2

Source reference: /affected/0/versions

3.6.5-0.1

Source reference: /affected/0/versions

3.6.5-0.1~deb13u1

Source reference: /affected/0/versions

3.6.6-0.1

Source reference: /affected/0/versions

3.6.6-0.1~deb13u1

Source reference: /affected/0/versions

3.6.7-2

Source reference: /affected/0/versions

3.6.7-3

Source reference: /affected/0/versions

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

mbedtls

Source reference: /affected/1/package/name

Affected versions
3.6.4-2

Source reference: /affected/1/versions

3.6.5-0.1

Source reference: /affected/1/versions

3.6.5-0.1~deb13u1

Source reference: /affected/1/versions

3.6.6-0.1

Source reference: /affected/1/versions

3.6.6-0.1~deb13u1

Source reference: /affected/1/versions

3.6.7-2

Source reference: /affected/1/versions

3.6.7-3

Source reference: /affected/1/versions

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

mbedtls

Source reference: /affected/2/package/name

Affected versions
3.6.4-2

Source reference: /affected/2/versions

3.6.5-0.1

Source reference: /affected/2/versions

3.6.5-0.1~deb13u1

Source reference: /affected/2/versions

3.6.6-0.1

Source reference: /affected/2/versions

3.6.6-0.1~deb13u1

Source reference: /affected/2/versions

Fixed versions
3.6.7-1

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": "mbedtls",
      "purl": "pkg:deb/debian/mbedtls?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "2.28.3-1",
      "2.28.4-1",
      "2.28.5-1",
      "2.28.6-1",
      "2.28.7-1",
      "2.28.7-1.1",
      "2.28.7-1.1~exp1",
      "2.28.8-1",
      "3.6.0-1",
      "3.6.0-2",
      "3.6.0-3",
      "3.6.2-1",
      "3.6.2-2",
      "3.6.2-3",
      "3.6.3-1",
      "3.6.4-1",
      "3.6.4-2",
      "3.6.5-0.1",
      "3.6.5-0.1~deb13u1",
      "3.6.6-0.1",
      "3.6.6-0.1~deb13u1",
      "3.6.7-2",
      "3.6.7-3"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73064.json"
    },
    "ecosystem_specific": {
      "urgency": "end-of-life"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "mbedtls",
      "purl": "pkg:deb/debian/mbedtls?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.6.4-2",
      "3.6.5-0.1",
      "3.6.5-0.1~deb13u1",
      "3.6.6-0.1",
      "3.6.6-0.1~deb13u1",
      "3.6.7-2",
      "3.6.7-3"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73064.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.6.7-1"
          }
        ]
      }
    ],
    "package": {
      "name": "mbedtls",
      "purl": "pkg:deb/debian/mbedtls?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.6.4-2",
      "3.6.5-0.1",
      "3.6.5-0.1~deb13u1",
      "3.6.6-0.1",
      "3.6.6-0.1~deb13u1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73064.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#19927 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement