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DEBIAN-CVE-2026-75900

Type: advisorySource: OSV1 source record

An out-of-bounds read vulnerability was found in swtpm's SWTPM_NVRAM_CheckHeader() function. The entry guard checks the buffer length against sizeof(bh), where bh is a pointer, instead of sizeof(*bh), the actual struct size. This allows an undersized buffer to pass validation, causing a 2-byte heap overread on 64-bit systems (6 bytes on 32-bit) when accessing the totlen field. This may cause daemon termination on some platforms and leaks heap data to the log.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-75900

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-2026-75900

swtpm

Source reference: /affected/0/package/name

Affected versions
0.10.1+ds-1

Source reference: /affected/0/versions

0.10.2-1

Source reference: /affected/0/versions

0.7.1-1.3

Source reference: /affected/0/versions

0.7.1-1.4

Source reference: /affected/0/versions

0.7.1-1.5

Source reference: /affected/0/versions

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

swtpm

Source reference: /affected/1/package/name

Affected versions
0.10.1+ds-1

Source reference: /affected/1/versions

0.10.2-1

Source reference: /affected/1/versions

0.7.1-1.5

Source reference: /affected/1/versions

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

swtpm

Source reference: /affected/2/package/name

Affected versions
0.10.1+ds-1

Source reference: /affected/2/versions

0.7.1-1.5

Source reference: /affected/2/versions

Fixed versions
0.10.2-1

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": "swtpm",
      "purl": "pkg:deb/debian/swtpm?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "0.10.1+ds-1",
      "0.10.2-1",
      "0.7.1-1.3",
      "0.7.1-1.4",
      "0.7.1-1.5"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75900.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "swtpm",
      "purl": "pkg:deb/debian/swtpm?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "0.10.1+ds-1",
      "0.10.2-1",
      "0.7.1-1.5"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75900.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0.10.2-1"
          }
        ]
      }
    ],
    "package": {
      "name": "swtpm",
      "purl": "pkg:deb/debian/swtpm?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "0.10.1+ds-1",
      "0.7.1-1.5"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75900.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#58198 · Revision 1
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Publisher date
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