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    Home»Security»Common Vulnerabilities and Exposures (CVEs)»CVE-2025-37832 – Allwinner cpufreq sun50i Linux Kernel Out-of-Bounds Read Vulnerability

    CVE-2025-37832 – Allwinner cpufreq sun50i Linux Kernel Out-of-Bounds Read Vulnerability

    May 8, 2025

    CVE ID : CVE-2025-37832

    Published : May 8, 2025, 7:15 a.m. | 58 minutes ago

    Description : In the Linux kernel, the following vulnerability has been resolved:

    cpufreq: sun50i: prevent out-of-bounds access

    A KASAN enabled kernel reports an out-of-bounds access when handling the
    nvmem cell in the sun50i cpufreq driver:
    ==================================================================
    BUG: KASAN: slab-out-of-bounds in sun50i_cpufreq_nvmem_probe+0x180/0x3d4
    Read of size 4 at addr ffff000006bf31e0 by task kworker/u16:1/38

    This is because the DT specifies the nvmem cell as covering only two
    bytes, but we use a u32 pointer to read the value. DTs for other SoCs
    indeed specify 4 bytes, so we cannot just shorten the variable to a u16.

    Fortunately nvmem_cell_read() allows to return the length of the nvmem
    cell, in bytes, so we can use that information to only access the valid
    portion of the data.
    To cover multiple cell sizes, use memcpy() to copy the information into a
    zeroed u32 buffer, then also make sure we always read the data in little
    endian fashion, as this is how the data is stored in the SID efuses.

    Severity: 0.0 | NA

    Visit the link for more details, such as CVSS details, affected products, timeline, and more…

    Source: Read More

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