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    Home»Security»Common Vulnerabilities and Exposures (CVEs)»CVE-2025-37984 – Linux Kernel ECDsa Integer Overflow Vulnerability

    CVE-2025-37984 – Linux Kernel ECDsa Integer Overflow Vulnerability

    May 20, 2025

    CVE ID : CVE-2025-37984

    Published : May 20, 2025, 6:15 p.m. | 34 minutes ago

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

    crypto: ecdsa – Harden against integer overflows in DIV_ROUND_UP()

    Herbert notes that DIV_ROUND_UP() may overflow unnecessarily if an ecdsa
    implementation’s ->key_size() callback returns an unusually large value.
    Herbert instead suggests (for a division by 8):

    X / 8 + !!(X & 7)

    Based on this formula, introduce a generic DIV_ROUND_UP_POW2() macro and
    use it in lieu of DIV_ROUND_UP() for ->key_size() return values.

    Additionally, use the macro in ecc_digits_from_bytes(), whose “nbytes”
    parameter is a ->key_size() return value in some instances, or a
    user-specified ASN.1 length in the case of ecdsa_get_signature_rs().

    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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    Previous ArticleCVE-2025-37987 – Linux PDS Core AdminQ Overflow/Stuck Condition Vulnerability
    Next Article CVE-2025-37986 – “USB Type-C: Invalid Pointer Vulnerability”

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