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DEBIAN-CVE-2026-85769

Type: advisorySource: OSV1 source record

A flaw was found in libtpms, a library that provides software TPM 2.0 emulation. When restoring TPM 2.0 state (for example during a virtual machine's power-on or state/migration restore), a malformed state blob can supply an oversized skip-block length that is not validated against the remaining size of the input buffer. This can drive an internal size counter negative, which bypasses a subsequent bounds check due to an unsafe signed-to-unsigned conversion, causing the parser to read memory outside the bounds of the heap buffer holding the state data. Successful exploitation can crash the process hosting libtpms (such as swtpm), resulting in a denial of service of the emulated TPM device and the virtual machine that depends on it. No data corruption or information disclosure was confirmed.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-85769

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-2026-85769

libtpms

Source reference: /affected/0/package/name

Affected versions
0.10.1-1

Source reference: /affected/0/versions

0.10.1-2

Source reference: /affected/0/versions

0.10.2-1

Source reference: /affected/0/versions

0.10.2-2

Source reference: /affected/0/versions

0.10.2-3

Source reference: /affected/0/versions

0.10.2-4

Source reference: /affected/0/versions

0.10.2-5

Source reference: /affected/0/versions

0.9.2-3.1

Source reference: /affected/0/versions

0.9.2-3.1+deb12u1

Source reference: /affected/0/versions

0.9.2-3.2

Source reference: /affected/0/versions

0.9.2-3.2+hurd.1

Source reference: /affected/0/versions

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

libtpms

Source reference: /affected/1/package/name

Affected versions
0.10.1-1

Source reference: /affected/1/versions

0.10.1-2

Source reference: /affected/1/versions

0.10.2-1

Source reference: /affected/1/versions

0.10.2-2

Source reference: /affected/1/versions

0.10.2-3

Source reference: /affected/1/versions

0.10.2-4

Source reference: /affected/1/versions

0.10.2-5

Source reference: /affected/1/versions

0.9.2-3.2

Source reference: /affected/1/versions

0.9.2-3.2+hurd.1

Source reference: /affected/1/versions

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

libtpms

Source reference: /affected/2/package/name

Affected versions
0.10.1-1

Source reference: /affected/2/versions

0.10.1-2

Source reference: /affected/2/versions

0.10.2-1

Source reference: /affected/2/versions

0.10.2-2

Source reference: /affected/2/versions

0.10.2-3

Source reference: /affected/2/versions

0.10.2-4

Source reference: /affected/2/versions

0.10.2-5

Source reference: /affected/2/versions

0.9.2-3.2

Source reference: /affected/2/versions

0.9.2-3.2+hurd.1

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": "libtpms",
      "purl": "pkg:deb/debian/libtpms?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "0.10.1-1",
      "0.10.1-2",
      "0.10.2-1",
      "0.10.2-2",
      "0.10.2-3",
      "0.10.2-4",
      "0.10.2-5",
      "0.9.2-3.1",
      "0.9.2-3.1+deb12u1",
      "0.9.2-3.2",
      "0.9.2-3.2+hurd.1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-85769.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "libtpms",
      "purl": "pkg:deb/debian/libtpms?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "0.10.1-1",
      "0.10.1-2",
      "0.10.2-1",
      "0.10.2-2",
      "0.10.2-3",
      "0.10.2-4",
      "0.10.2-5",
      "0.9.2-3.2",
      "0.9.2-3.2+hurd.1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-85769.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "libtpms",
      "purl": "pkg:deb/debian/libtpms?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "0.10.1-1",
      "0.10.1-2",
      "0.10.2-1",
      "0.10.2-2",
      "0.10.2-3",
      "0.10.2-4",
      "0.10.2-5",
      "0.9.2-3.2",
      "0.9.2-3.2+hurd.1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-85769.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#58404 · Revision 1
Added to Heist Feed
Publisher date
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