CVE-2025-37984

MEDIUM EPSS 4.5%
Published May 20, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
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Published May 20, 2025 1y ago
Last Modified Jun 17, 2026 1w 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().

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-190 Integer Overflow or Wraparound Numeric Error

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥6.6.70  –  <6.6.99
linuxlinux_kernel*≥6.10  –  <6.12.39
linuxlinux_kernel*≥6.13  –  <6.14.5

References 4

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

Remediation

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