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    CVE-2021-47509

    In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Limit the period size to 16MB Set the practical limit to the period size (the fragment shift in OSS) instead of a full 31bit; a too large value could lead to the exhaust of memory as we allocate temporary buffers of the period size, too. As of this patch, we set to 16MB limit, which should cover all use cases.

    Published:May 24, 2024
    Last Modified:Dec 18, 2025
    EPS:May 24, 2024
    EPSS Score:0.00014
    CVSS Score:5.5

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    No exploit reference

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    References

    https://git.kernel.org/stable/c/2e54cf6794bf82a54aaefc78da13819aea9cd28a
    https://git.kernel.org/stable/c/35a3e511032146941085f87dd9fb5b82ea5c00a2
    https://git.kernel.org/stable/c/76f19e4cbb548e28547f8c328aa0bfb3a10222d3
    https://git.kernel.org/stable/c/8839c8c0f77ab8fc0463f4ab8b37fca3f70677c2
    https://git.kernel.org/stable/c/ad45babf7886e7a212ee1d5eda9ef49f696db43c
    https://git.kernel.org/stable/c/b02a41eebcc36d4f07196780f2e165ca2c499257
    https://git.kernel.org/stable/c/be55f306396cd62c6889286a7194fd8b53363aeb
    https://git.kernel.org/stable/c/d1bb703ad050de9095f10b2d3416c32921ac6bcc
    https://git.kernel.org/stable/c/2e54cf6794bf82a54aaefc78da13819aea9cd28a
    https://git.kernel.org/stable/c/35a3e511032146941085f87dd9fb5b82ea5c00a2
    https://git.kernel.org/stable/c/76f19e4cbb548e28547f8c328aa0bfb3a10222d3
    https://git.kernel.org/stable/c/8839c8c0f77ab8fc0463f4ab8b37fca3f70677c2
    https://git.kernel.org/stable/c/ad45babf7886e7a212ee1d5eda9ef49f696db43c
    https://git.kernel.org/stable/c/b02a41eebcc36d4f07196780f2e165ca2c499257
    https://git.kernel.org/stable/c/be55f306396cd62c6889286a7194fd8b53363aeb
    https://git.kernel.org/stable/c/d1bb703ad050de9095f10b2d3416c32921ac6bcc

    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
    None
    Low
    High