CVE-2021-47055

    Dashboard / Vulnerabilities / CVE-2021-47055

    CVE-2021-47055

    Published: 29 Feb 2024Last Modified: 15 Mar 2026

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: mtd: require write permissions for locking and badblock ioctls MEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require write permission. Depending on the hardware MEMLOCK might even be write-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK is always write-once. MEMSETBADBLOCK modifies the bad block table.

    References: https://git.kernel.org/stable/c/a08799d3e8c8088640956237c183f83463c39668, https://git.kernel.org/stable/c/077259f5e777c3c8821f6b41dee709fcda27306b, https://git.kernel.org/stable/c/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcaf, https://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424bee, https://git.kernel.org/stable/c/1e97743fd180981bef5f01402342bb54bf1c6366, https://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981, https://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37, https://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877e, https://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0

    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-2021-47055 | CVE-DB