USN-6455-2

    Dashboard / Vulnerabilities / USN-6455-2

    USN-6455-2

    Published: 10 Jun 2026Last Modified: 10 Jun 2026

    Summary: exim4 regression

    Details: USN-6455-1 fixed vulnerabilities in Exim. The fix for CVE-2023-42117 introduced a regression on Ubuntu 22.04 LTS that resulted in certain connections logging a Taint mismatch error. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that Exim incorrectly handled validation of user-supplied data, which could lead to memory corruption. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2023-42117) It was discovered that Exim incorrectly handled validation of user-supplied data, which could lead to an out-of-bounds read. An attacker could possibly use this issue to expose sensitive information. (CVE-2023-42119)

    References: https://ubuntu.com/security/notices/USN-6455-2, https://launchpad.net/bugs/2152830

    Affected packages

    Package

    Name: exim4

    Purl: pkg:deb/ubuntu/exim4?arch=source&distro=jammy

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.95-4ubuntu2.10

    Affected versions

    4.94.2-7ubuntu2

    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
    USN-6455-2 | CVE-DB