CVE-2023-6546

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    CVE-2023-6546

    Published: 21 Dec 2023Last Modified: 15 Mar 2026

    Summary:

    Details: A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. This issue occurs when two threads execute the GSMIOC_SETCONF ioctl on the same tty file descriptor with the gsm line discipline enabled, and can lead to a use-after-free problem on a struct gsm_dlci while restarting the gsm mux. This could allow a local unprivileged user to escalate their privileges on the system.

    References: http://www.openwall.com/lists/oss-security/2024/04/10/21, http://www.openwall.com/lists/oss-security/2024/04/16/2, http://www.openwall.com/lists/oss-security/2024/04/17/1, http://www.openwall.com/lists/oss-security/2024/04/11/9, http://www.openwall.com/lists/oss-security/2024/04/12/1, http://www.openwall.com/lists/oss-security/2024/04/12/2, http://www.openwall.com/lists/oss-security/2024/04/11/7, http://www.openwall.com/lists/oss-security/2024/04/10/18, https://access.redhat.com/errata/RHSA-2024:1612, https://access.redhat.com/errata/RHSA-2024:4729, https://www.zerodayinitiative.com/advisories/ZDI-CAN-20527, https://access.redhat.com/errata/RHSA-2024:1607, https://access.redhat.com/errata/RHSA-2024:1614, https://access.redhat.com/security/cve/CVE-2023-6546, https://access.redhat.com/errata/RHSA-2024:0937, https://access.redhat.com/errata/RHSA-2024:1253, https://access.redhat.com/errata/RHSA-2024:2621, https://access.redhat.com/errata/RHSA-2024:4577, https://access.redhat.com/errata/RHSA-2024:1018, https://access.redhat.com/errata/RHSA-2024:1019, https://access.redhat.com/errata/RHSA-2024:1055, https://access.redhat.com/errata/RHSA-2024:1250, https://access.redhat.com/errata/RHSA-2024:2394, https://access.redhat.com/errata/RHSA-2024:0930, https://access.redhat.com/errata/RHSA-2024:2093, https://access.redhat.com/errata/RHSA-2024:4970, https://access.redhat.com/errata/RHSA-2024:1306, https://access.redhat.com/errata/RHSA-2024:2697, https://access.redhat.com/errata/RHSA-2024:4731, https://github.com/torvalds/linux/commit/3c4f8333b582487a2d1e02171f1465531cde53e3, https://bugzilla.redhat.com/show_bug.cgi?id=2255498

    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-2023-6546 | CVE-DB