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DEBIAN-CVE-2026-25210

Type: advisorySource: OSV1 source record

In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-25210

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-2026-25210

expat

Source reference: /affected/0/package/name

Affected versions
2.5.0-1

Source reference: /affected/0/versions

2.5.0-1+deb12u1

Source reference: /affected/0/versions

2.5.0-1+deb12u2

Source reference: /affected/0/versions

2.5.0-1+deb12u3

Source reference: /affected/0/versions

Fixed versions
2.5.0-1+deb12u4

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

expat

Source reference: /affected/1/package/name

Affected versions
2.7.1-2

Source reference: /affected/1/versions

2.7.2-1

Source reference: /affected/1/versions

2.7.3-1

Source reference: /affected/1/versions

2.7.3-2

Source reference: /affected/1/versions

2.7.4-1

Source reference: /affected/1/versions

2.7.5-1

Source reference: /affected/1/versions

2.8.0-1

Source reference: /affected/1/versions

2.8.0-2

Source reference: /affected/1/versions

2.8.1-1

Source reference: /affected/1/versions

Fixed versions
2.8.2-1~deb13u1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

expat

Source reference: /affected/2/package/name

Affected versions
2.7.1-2

Source reference: /affected/2/versions

2.7.2-1

Source reference: /affected/2/versions

2.7.3-1

Source reference: /affected/2/versions

2.7.3-2

Source reference: /affected/2/versions

Fixed versions
2.7.4-1

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"
          },
          {
            "fixed": "2.5.0-1+deb12u4"
          }
        ]
      }
    ],
    "package": {
      "name": "expat",
      "purl": "pkg:deb/debian/expat?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "2.5.0-1",
      "2.5.0-1+deb12u1",
      "2.5.0-1+deb12u2",
      "2.5.0-1+deb12u3"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-25210.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2.8.2-1~deb13u1"
          }
        ]
      }
    ],
    "package": {
      "name": "expat",
      "purl": "pkg:deb/debian/expat?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "2.7.1-2",
      "2.7.2-1",
      "2.7.3-1",
      "2.7.3-2",
      "2.7.4-1",
      "2.7.5-1",
      "2.8.0-1",
      "2.8.0-2",
      "2.8.1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-25210.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2.7.4-1"
          }
        ]
      }
    ],
    "package": {
      "name": "expat",
      "purl": "pkg:deb/debian/expat?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "2.7.1-2",
      "2.7.2-1",
      "2.7.3-1",
      "2.7.3-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-25210.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56280 · Revision 1
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Publisher date
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