CVE-2026-29645 Other in n/a
Attackers can cause denial of service and state corruption in NEMU by providing crafted RISC-V binaries that exploit improper instruction validation in the RVV decoder.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-29645?
CVE-2026-29645 is a high-severity vulnerability in n/a, published on 20 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-29645?
It affects 1 product.
Products include Xiangshan Nemu.
How do I fix CVE-2026-29645?
No fix has been published for CVE-2026-29645 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-29645 being exploited?
There is no known exploitation of CVE-2026-29645 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-prqq-qrc5-xvpr.