UBUNTU-CVE-2022-3176

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    UBUNTU-CVE-2022-3176

    Published: 16 Sept 2022Last Modified: 9 Sept 2026
    Upstream:
    CVE-2022-3176
    Aliases:
    USN-5667-1
    USN-5668-1
    USN-5677-1

    Summary:

    Details: There exists a use-after-free in io_uring in the Linux kernel. Signalfd_poll() and binder_poll() use a waitqueue whose lifetime is the current task. It will send a POLLFREE notification to all waiters before the queue is freed. Unfortunately, the io_uring poll doesn't handle POLLFREE. This allows a use-after-free to occur if a signalfd or binder fd is polled with io_uring poll, and the waitqueue gets freed. We recommend upgrading past commit fc78b2fc21f10c4c9c4d5d659a685710ffa63659

    References: https://ubuntu.com/security/CVE-2022-3176, https://kernel.dance/#fc78b2fc21f10c4c9c4d5d659a685710ffa63659, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit?h=linux-5.4.y&id=fc78b2fc21f10c4c9c4d5d659a685710ffa63659, https://ubuntu.com/security/notices/USN-5667-1, https://ubuntu.com/security/notices/USN-5668-1, https://ubuntu.com/security/notices/USN-5677-1, https://ubuntu.com/security/notices/USN-5682-1, https://ubuntu.com/security/notices/USN-5683-1, https://ubuntu.com/security/notices/USN-5703-1, https://ubuntu.com/security/notices/USN-5706-1, https://www.cve.org/CVERecord?id=CVE-2022-3176

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/linux-hwe-edge?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.8.0-28.30~16.04.1
    4.8.0-30.32~16.04.1
    4.8.0-32.34~16.04.1
    4.8.0-34.36~16.04.1

    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-2022-3176 | CVE-DB