CVE-2026-29646 Privilege escalation in n/a
A guest write to supervisor interrupt-enable CSR in OpenXiangShan NEMU with RVH enabled can corrupt machine-level interrupt state, breaking isolation.
- 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-2026-29646?
CVE-2026-29646 is a critical 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
In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to the supervisor interrupt-enable CSR (sie) may be handled incorrectly and can influence machine-level interrupt enable state (mie). This breaks privilege/virtualization isolation and can lead to denial of service or privilege-boundary violation in environments relying on NEMU for correct interrupt virtualization.
Weakness: CWE-267
Which versions are affected by CVE-2026-29646?
How do I fix CVE-2026-29646?
No fix has been published for CVE-2026-29646 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-29646 being exploited?
There is no known exploitation of CVE-2026-29646 in the wild and no public exploit code.
Sources
Also known as GHSA-729m-5x6m-wwxv.