CVE-2023-4194

    Dashboard / Vulnerabilities / CVE-2023-4194

    CVE-2023-4194

    Published: 7 Aug 2023Last Modified: 15 Mar 2026

    Summary:

    Details: A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to bypass network filters and gain unauthorized access to some resources. The original patches fixing CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits - a096ccca6e50 ("tun: tun_chr_open(): correctly initialize socket uid"), - 66b2c338adce ("tap: tap_open(): correctly initialize socket uid"), pass "inode->i_uid" to sock_init_data_uid() as the last parameter and that turns out to not be accurate.

    References: https://lists.fedoraproject.org/archives/list/[email protected]/message/344H6HO6SSC4KT7PDFXSDIXKMKHISSGF/, https://lists.fedoraproject.org/archives/list/[email protected]/message/3TYLSJ2SAI7RF56ZLQ5CQWCJLVJSD73Q/, https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html, https://security.netapp.com/advisory/ntap-20231027-0002/, https://access.redhat.com/security/cve/CVE-2023-4194, https://www.debian.org/security/2023/dsa-5480, https://www.debian.org/security/2023/dsa-5492, https://access.redhat.com/errata/RHSA-2023:6583, https://bugzilla.redhat.com/show_bug.cgi?id=2229498, https://lore.kernel.org/all/[email protected]/, https://lore.kernel.org/all/[email protected]/, https://lore.kernel.org/all/[email protected]/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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
    CVE-2023-4194 | CVE-DB