UBUNTU-CVE-2026-84270

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    UBUNTU-CVE-2026-84270

    Published: 1 Sept 2026Last Modified: 3 Nov 2026
    Upstream:
    CVE-2026-84270
    Aliases:
    USN-8970-1

    Summary:

    Details: A flaw was found in the MTP backend in gvfs. When reading a file from a mounted MTP device, do_read() in gvfsbackendmtp.c trusts the data length returned by the device without limiting it to the original size requested by the client. If a malicious MTP device responds with more bytes than requested, this unrestricted length is passed directly to memcpy(). This causes the operation to read memory outside the intended boundaries. This allows an attacker who plugs in a malicious MTP device to cause a segmentation fault when a file is read and crash the gvfsd-mtp process, resulting in a denial of service.

    References: https://ubuntu.com/security/CVE-2026-84270, https://www.cve.org/CVERecord?id=CVE-2026-84270, https://gitlab.gnome.org/GNOME/gvfs/-/merge_requests/340, https://ubuntu.com/security/notices/USN-8970-1

    Affected packages

    Package

    Name: gvfs

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.24.2-0ubuntu4
    1.24.2-0ubuntu5
    1.24.2-0ubuntu6

    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
    UBUNTU-CVE-2026-84270 | CVE-DB