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    CVE-2026-18743

    A flaw was found in popt. This vulnerability allows an attacker to provide specially crafted configuration content to a host, which, when loaded, can lead to a small memory corruption issue. This occurs because of an error in how the `poptConfigFileToString` function reallocates memory for buffers. Successful exploitation could result in heap metadata corruption, potentially causing the affected process to become unavailable (denial of service).

    Published:Sep 1, 2026
    Last Modified:Sep 1, 2026
    EPS:Sep 1, 2026
    EPSS Score:0.00124
    CVSS Score:2.5

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Hardened Images
    Vendor
    Redhat
    Product
    Hummingbird
    Vendor
    Redhat
    Product
    Openshift
    Vendor
    Redhat
    Product
    Openshift Container Platform
    Vendor
    Rpm-software-management
    Product
    Popt

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-100 Overflow Buffers
    CAPEC-47 Buffer Overflow via Parameter Expansion

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    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