CVE-2026-29649: NEMU Has a
Source CVE Database V5
Not known to be exploited · CVSS 9.8 Critical.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 20 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
Users should monitor vendor communications for updates and consider restricting untrusted machine-mode writes to menvcfg registers if possible as a precaution.
Description
NEMU has a vulnerability in its RISC-V Hypervisor CSR handling where certain hypervisor environment configuration bits are incorrectly updated due to a machine-mode write to a related control register. This flaw can cause improper enforcement of virtualization settings, potentially leading to unexpected traps or denial of service during cache-block management instructions in virtualized environments. The vulnerability has a critical CVSS score of 9.8, indicating high impact on confidentiality, integrity, and availability. No patch or official remediation guidance is currently available.