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    CVE-2021-47480

    In the Linux kernel, the following vulnerability has been resolved: scsi: core: Put LLD module refcnt after SCSI device is released SCSI host release is triggered when SCSI device is freed. We have to make sure that the low-level device driver module won't be unloaded before SCSI host instance is released because shost->hostt is required in the release handler. Make sure to put LLD module refcnt after SCSI device is released. Fixes a kernel panic of 'BUG: unable to handle page fault for address' reported by Changhui and Yi.

    Published:May 22, 2024
    Last Modified:Dec 18, 2025
    EPS:May 22, 2024
    EPSS Score:0.00025
    CVSS Score:5.5

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://git.kernel.org/stable/c/1105573d964f7b78734348466b01f5f6ba8a1813
    https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b
    https://git.kernel.org/stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee
    https://git.kernel.org/stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f
    https://git.kernel.org/stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428
    https://git.kernel.org/stable/c/c2df161f69fb1c67f63adbd193368b47f511edc0
    https://git.kernel.org/stable/c/f2b85040acec9a928b4eb1b57a989324e8e38d3f
    https://git.kernel.org/stable/c/f30822c0b4c35ec86187ab055263943dc71a6836
    https://git.kernel.org/stable/c/1105573d964f7b78734348466b01f5f6ba8a1813
    https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b
    https://git.kernel.org/stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee
    https://git.kernel.org/stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f
    https://git.kernel.org/stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428
    https://git.kernel.org/stable/c/c2df161f69fb1c67f63adbd193368b47f511edc0
    https://git.kernel.org/stable/c/f2b85040acec9a928b4eb1b57a989324e8e38d3f
    https://git.kernel.org/stable/c/f30822c0b4c35ec86187ab055263943dc71a6836

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
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    High
    User Interaction
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    Scope
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    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
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    High