CVE-2026-29648
Privilege escalation in OpenXiangShan NEMU; CSR isolation bypass risk.
Is CVE-2026-29648 being exploited?
Not confirmed. CVE-2026-29648 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-29648?
CVE-2026-29648 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-29648?
Not known from our data. No patch reference has been recorded for CVE-2026-29648, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-29648 affect?
CVE-2026-29648 affects OpenXiangShan NEMU (Smstateen). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-29648?
Patch when available; disable Smstateen or ENVCFG exposure if feasible.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Low-priv code can read/write henvcfg/senvcfg, bypassing virtualization isolation.
Patch when possible