USN-5638-2

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    USN-5638-2

    Published: 17 Nov 2022Last Modified: 27 Apr 2026

    Summary: expat vulnerabilities

    Details: USN-5638-1 fixed a vulnerability in Expat. This update provides the corresponding updates for Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. It was discovered that Expat incorrectly handled memory in out-of-memory situations. An attacker could possibly use this issue to cause a crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2022-43680) Original advisory details: Rhodri James discovered that Expat incorrectly handled memory when processing certain malformed XML files. An attacker could possibly use this issue to cause a crash or execute arbitrary code.

    References: https://ubuntu.com/security/notices/USN-5638-2, https://ubuntu.com/security/CVE-2022-40674, https://ubuntu.com/security/CVE-2022-43680

    Affected packages

    Package

    Name: expat

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.2.5-3ubuntu0.8

    Affected versions

    2.2.3-1
    2.2.3-2
    2.2.5-0ubuntu2
    2.2.5-3
    2.2.5-3ubuntu0.1
    2.2.5-3ubuntu0.2
    2.2.5-3ubuntu0.4
    2.2.5-3ubuntu0.7

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High