CVE-2025-37984

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().

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/921b8167f10708e38080f84e195cdc68a7a561f1	Patch
https://git.kernel.org/stable/c/b16510a530d1e6ab9683f04f8fb34f2e0f538275	Patch
https://git.kernel.org/stable/c/f02f0218be412cff1c844addf58e002071be298b	Patch
https://git.kernel.org/stable/c/f2133b849ff273abddb6da622daddd8f6f6fa448	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2025-05-20 18:15

Updated : 2025-11-14 17:00

NVD link : CVE-2025-37984

Mitre link : CVE-2025-37984

CVE.ORG link : CVE-2025-37984

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-190

Integer Overflow or Wraparound

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