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CVE-2025-37984 Detail

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().


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/921b8167f10708e38080f84e195cdc68a7a561f1 kernel.org
https://git.kernel.org/stable/c/b16510a530d1e6ab9683f04f8fb34f2e0f538275 kernel.org
https://git.kernel.org/stable/c/f02f0218be412cff1c844addf58e002071be298b kernel.org
https://git.kernel.org/stable/c/f2133b849ff273abddb6da622daddd8f6f6fa448 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-37984
NVD Published Date:
05/20/2025
NVD Last Modified:
07/25/2025
Source:
kernel.org