VULNERABILITY INTELLIGENCE

CVE-2021-40507

CVSS score9.8 CRITICAL
EPSS probability0.73%
CISA KEVNot currently listed
Published2023-04-18
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

An issue was discovered in the ALU unit of the OR1200 (aka OpenRISC 1200) processor 2011-09-10 through 2015-11-11. The overflow flag is not being updated correctly for the subtract instruction, which results in an incorrect value in the overflow flag. Any software that relies on this flag may experience corruption in execution.

Weakness classification

  • nvd@nist.gov: CWE-287
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-287

Primary references