USN-8022-2

It was discovered that Expat incorrectly handled the initialization of parsers for external entities. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-24515)

It was discovered that Expat incorrectly handled integer calculations when allocating memory for XML tags. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-25210)

References

Affected packages

Ubuntu:24.04:LTS / expat

Package

Name: expat
Purl: pkg:deb/ubuntu/expat@2.6.1-2ubuntu0.4?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.6.1-2ubuntu0.4

Affected versions

2.*

2.5.0-2

2.6.0-1

2.6.1-2

2.6.1-2build1

2.6.1-2ubuntu0.1

2.6.1-2ubuntu0.2

2.6.1-2ubuntu0.3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "expat",
            "binary_version": "2.6.1-2ubuntu0.4"
        },
        {
            "binary_name": "libexpat1",
            "binary_version": "2.6.1-2ubuntu0.4"
        },
        {
            "binary_name": "libexpat1-dev",
            "binary_version": "2.6.1-2ubuntu0.4"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8022-2.json"

cves_map

{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-24515",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-25210",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ]
}