Critical severity9.8NVD Advisory· Published Apr 18, 2023· Updated Jun 17, 2026
CVE-2021-40507
CVE-2021-40507
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.
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Affected products
2- OpenRISC/OpenRISC 1200description
Patches
Vulnerability mechanics
References
2- github.com/openrisc/or1200/commit/2c0765d7ba12813df273cd693a99c4e744f0fbd5nvdPatch
- seth.engr.tamu.edu/software-releases/thehuzz/nvdThird Party Advisory
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