CVE-2026-29646
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 0.4%
exploitation probability
0.4%top 71% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
n/a · n/aReferences
https://docs.riscv.org/reference/isa/priv/hypervisor.htmlhttps://docs.riscv.org/reference/isa/priv/machine.htmlhttps://docs.riscv.org/reference/isa/priv/supervisor.htmlhttps://docs.riscv.org/reference/isa/unpriv/zicsr.htmlhttps://github.com/OpenXiangShan/NEMU/issues/951https://github.com/OpenXiangShan/NEMU/pull/938https://github.com/OpenXiangShan/NEMU/pull/938/commits/55295c46580456d8d5a9d5736e1fda924b8825ab