What is CVE-2026-29646?

CVE-2026-29646 is a critical-severity vulnerability in N/a, classified under Privilege Defined With Unsafe Actions. CVSS score: 9.8/10. Published 2026-04-20.

How severe is CVE-2026-29646?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Privilege escalation in N/a

CVE-2026-29646

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 st…

EPSS: 0.004 (28.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-267 — Privilege Defined With Unsafe Actions

References

cve@mitre.org
cve@mitre.org
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cve@mitre.org
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Frequently asked questions

What is CVE-2026-29646?: CVE-2026-29646 is a critical-severity vulnerability in N/a, classified under Privilege Defined With Unsafe Actions. CVSS score: 9.8/10. Published 2026-04-20.
How severe is CVE-2026-29646?: Critical severity. CVSS v3 base score is 9.8 out of 10.