USN-8996-1

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    USN-8996-1

    Published: 4 Nov 2026Last Modified: 5 Nov 2026

    Summary: apt vulnerability

    Details: Max Justicz discovered that APT incorrectly handled hard links when encountering redirects and retrying package downloads. A remote on-path attacker could possibly use this issue to trick APT into installing an unverified package and achieve remote code execution with root privileges.

    References: https://ubuntu.com/security/notices/USN-8996-1, https://ubuntu.com/security/CVE-2026-109518

    Affected packages

    Package

    Name: apt

    Purl: pkg:deb/ubuntu/apt?arch=source&distro=esm-infra-legacy%2Ftrusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.0.1ubuntu2.24+esm4

    Affected versions

    0.9.9.1~ubuntu3
    0.9.9.1~ubuntu4
    0.9.9.1~ubuntu5
    0.9.13~exp1ubuntu1
    0.9.13~exp1ubuntu2
    0.9.13~exp1ubuntu3
    0.9.13.1~ubuntu1
    0.9.14.1ubuntu1
    0.9.14.1ubuntu2
    0.9.15.1ubuntu1
    0.9.15.4ubuntu1
    0.9.15.4ubuntu2
    0.9.15.4ubuntu3
    0.9.15.4ubuntu4
    0.9.15.4ubuntu5

    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-8996-1 | CVE-DB