UBUNTU-CVE-2021-47087

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    UBUNTU-CVE-2021-47087

    Published: 4 Mar 2024Last Modified: 6 Aug 2026
    Upstream:
    CVE-2021-47087

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: tee: optee: Fix incorrect page free bug Pointer to the allocated pages (struct page *page) has already progressed towards the end of allocation. It is incorrect to perform __free_pages(page, order) using this pointer as we would free any arbitrary pages. Fix this by stop modifying the page pointer.

    References: https://ubuntu.com/security/CVE-2021-47087, https://git.kernel.org/linus/18549bf4b21c739a9def39f27dcac53e27286ab5, https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a, https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad, https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29, https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5, https://www.cve.org/CVERecord?id=CVE-2021-47087

    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-2021-47087 | CVE-DB