CVE-2026-29649
DoS via hypervisor env config corruption in NEMU RISC-V hypervisor
Is CVE-2026-29649 being exploited?
Not confirmed. CVE-2026-29649 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 0.45% probability of exploitation in the next 30 days.
How severe is CVE-2026-29649?
CVE-2026-29649 is rated Critical with a CVSS score of 9.8. 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-2026-29649?
Yes. A fix has been recorded for CVE-2026-29649. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-29649 affect?
CVE-2026-29649 affects NEMU, RISC-V hypervisor. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-29649?
Monitor for updates; patch when available
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Denial of service via menvcfg write; mis-set hypervisor env can trap or stall virtual machines during cache-block ops (V=1).
Monitor only