Description
NEMU (OpenXiangShan/NEMU) before v2025.12.r2 contains an improper instruction-validation flaw in its RISC-V Vector (RVV) decoder. The decoder does not correctly validate the funct3 field when decoding vsetvli/vsetivli/vsetvl, allowing certain invalid OP-V instruction encodings to be misinterpreted and executed as vset* configuration instructions rather than raising an illegal-instruction exception. This can be exploited by providing crafted RISC-V binaries to cause incorrect trap behavior, architectural state corruption/divergence, and potential denial of service in systems that rely on NEMU for correct execution or sandboxing.
INFO
Published Date :
2026-04-20T00:00:00.000Z
Last Modified :
2026-04-21T19:51:06.424Z
Source :
mitre
AFFECTED PRODUCTS
The following products are affected by CVE-2026-29645 vulnerability.
| Vendors | Products |
|---|---|
| Openxiangshan |
|
| Xiangshan |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-29645.
