CVE-2026-29648 Privilege escalation in n/a
Less-privileged code can bypass isolation controls to read or write sensitive CSRs in OpenXiangShan NEMU when Smstateen is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-29648?
CVE-2026-29648 is a high-severity vulnerability in n/a, published on 20 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In OpenXiangShan NEMU, when Smstateen is enabled, clearing mstateen0.ENVCFG does not correctly restrict access to henvcfg and senvcfg. As a result, less-privileged code may read or write these CSRs without the required exception, potentially bypassing intended state-enable based isolation controls in virtualized or multi-privilege environments.
Weakness: CWE-269
Which versions are affected by CVE-2026-29648?
How do I fix CVE-2026-29648?
No fix has been published for CVE-2026-29648 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-29648 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-29648 exists.
Sources
Also known as GHSA-2vgw-r373-m9qx.